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Authorities are investigating a suspicious package that may have been sent to Joe Biden but was misaddressed, according to numerous reports.

CNN reported that the package is considered suspicious because it is similar to the bombs sent to various addresses across the country on Wednesday.

An analyst on MSNBC said that investigators believe the wrong address may have been written on the package and it could have been sent back - perhaps to the office of Debbie Wasserman Schultz.

Postal service workers have been made aware of the package possibly being in the mail system, Jonathan Dienst told MSNBC's Chris Hayes on Wednesday.

A beefed up security presence was seen outside the former vice president's home in Greenville, Delaware on Wednesday

Investigators conducted a sweep of the premises and did not find anything suspicious

Earlier on Wednesday, Biden (seen above on Monday with Florida gubernatorial candidate Andrew Gillum and Senator Bill Nelson) reacted to reports of suspicious packages that were sent to the Clintons, the Obamas, CNN, and George Soros 

'This country has to come together,' Biden tweeted on Wednesday. 'This division, this hatred, this ugliness has to end'

Dienst's comments were reported by RawStory. 

A beefed up security presence was seen outside the former vice president's home in Greenville, Delaware on Wednesday.

Investigators conducted a sweep of the premises and did not find anything suspicious, according to the Delaware News Journal. 

The search was conducted by New Castle County Police.

Biden's home is a 7,000-square-foot custom house situated on a private lake. 

Biden also maintains a vacation home in Rehoboth Beach, Delaware. 

There was no police activity in and around the home on Wednesday, authorities said.

Two suspicious packages were sent to Maxine Waters (bottom row center). Pipe bombs addressed to Hillary Clinton (top row second from left), Barack Obama (top row far right), John Brennan (bottom row far right) and Eric Holder (bottom row far left) have also been intercepted. The package sent to Holder had the return address of Debbie Wasserman Schultz

The Federal Bureau of Investigation confirmed that two more suspicious packages were sent to Waters 'that are similar in appearance' 

The seventh threat was announced as federal authorities investigated a second suspicious package sent to Democratic Rep. Maxine Waters.

Officials flagged a piece of mail that was sent through a LA sorting office.

It forced the evacuation of a mall outside LA. 

The FBI confirmed that the two additional suspicious packages are similar in appearance to five others that were received.

The FBI updated its tally in a tweet Wednesday night.

Earlier in the day, Waters said her Washington office was the target of a suspicious package, though it wasn’t immediately clear if that was related to the others.

Authorities say pipe bombs addressed to Hillary Clinton, former President Barack Obama, former CIA director John Brennan and former Attorney General Eric Holder have also been intercepted in recent days.

None of the packages detonated, and nobody was hurt. There was no immediate claim of responsibility.  

But news of the threats heightened tensions in a nation deeply polarized ahead of elections on Nov. 6 that will decide whether Democrats take control of one or both houses of Congress from Republicans and deny President Donald Trump the majority his party now holds in both.

President Donald Trump told a political rally in Wisconsin that his government would conduct 'an aggressive investigation.'

'Any acts or threats of political violence are an attack on our democracy itself,' Trump said. 

'We want all sides to come together in peace and harmony.'

But he said the media has a responsibility 'to stop the endless hostility and constant negative and oftentimes false attacks and stories.' 

The first package, which turned up on Monday, was addressed to billionaire financier George Soros, a prominent Democratic Party donor and frequent target of right-wing conspiracy theories.

Multiple suspected explosive devices were found in the mail addressed to Barack Obama, Hillary Clinton and CNN's New York newsroom on Wednesday. Pictured above is the pipe bomb sent to CNN's newsroom

A police bomb squad was sent to CNN's offices in New York on Wednesday and the newsroom was evacuated because of a pipe bomb found in an envelope addressed to former CIA director John Brennan

The FBI said the packages were mailed in manilla envelopes and were affixed with computer-printed address labels with six stamps bearing the Stars and Stripes. The packages had the return address of former DNC chairwoman Debbie Wasserman Schultz in Florida

Two bombs have been found in the mail addressed to former President Barack Obama and former Secretary of State Hillary Clinton, according to the Secret Service 

The parcel intended for Holder ended up rerouted to the return address that had been printed on all five packages - the Florida office of Wasserman Schultz, who formerly chaired the Democratic National Committee, according to the FBI.

'It is possible that additional packages were mailed to other locations,' the FBI said in a statement on its website. 

Trump spoke about pipe bomb incidents Wednesday at a White House event, where signed an opioid epidemic law that will make medical treatment more readily available to drug abusers and crack down on the mailing of illegal substances.

Trump said in the statement: 'I just want to tell you that in these times, we have to unify... we have to come together and send one very clear, strong, unmistakable message that acts or threats of political violence of any kind have no place in the Untied States of America.

'The safety of the American people is my highest and absolute priority. I've just concluded a briefing with the FBI, Department of Justice, Department of Homeland Security and the US Secret Service.

'As we speak, the packages are being inspected by top explosive experts and a major federal investigation is now underway.

'The full weight of our government is being deployed to conduct this investigation and bring those responsible for these despicable acts to justice.'

Officials suspect a serial bomber is behind the rash of homemade explosives sent in the mail. 

Secret Service agents revealed earlier in the day they had intercepted two explosives en route to former Obama's Washington D.C. home and the Clintons' property in Chappaqua, New York.

A short time later, a police bomb squad was sent to CNN's offices in New York City and the newsroom was evacuated because of a pipe bomb found in an envelope addressed to Brennan. 

The crude devices were made of PVC tubing attached to a digital clock available for purchase on Amazon. 

They included sulfur as explosives and shards of glass as shrapnel, law enforcement officials said.

The package sent to Hillary and Bill Clinton's property in Chappaqua, New York was found by an employee who screens their mail. Police guarded the property early Wednesday

A device addressed to former President Obama's home in Washington D.C. was intercepted by Secret Service. Law enforcement were spotted outside the home early Wednesday morning

A short time later, a police bomb squad was sent to CNN's offices (above) in New York City and the newsroom was evacuated because of a suspicious package 

A robotic device and members of the bomb squad were deployed outside the building in Sunrise, Florida where Rep. Debbie Wasserman Schultz has an office following reports of a suspicious device

The three devices targeting Obama, the Clintons and CNN were similar to the small pipe bomb found at Soros' New York home on Monday and appear to have been sent by the same person, NYPD's chief of counterterrorism said.

The FBI said the packages were mailed in manilla envelopes with bubble wrap interior. 

The packages were affixed with computer-printed address labels and six stamps bearing the Stars and Stripes. 

All packages had the return address of Wasserman Schultz in Florida.

The explosive device intended for Holder was returned to her Florida office - also sparking an evacuation there on Wednesday afternoon.

All of those targeted are among Trump's biggest political enemies and have been subjected to his ire on Twitter.

The White House also called the attacks as 'despicable', while officials described the events as a coordinated 'effort to terrorize' just days before polarizing US elections.

The White House issued a statement regarding the devices, condemning the 'violent attacks'.

'We condemn the attempted violent attacks recently made against President Obama, President Clinton, Secretary Clinton, and other public figures,' a statement from press secretary Sarah Sanders said.

'These terrorizing acts are despicable, and anyone responsible will be held accountable to the fullest extent of the law. The United States Secret Service and other law enforcement agencies are investigating and will take all appropriate actions to protect anyone threatened by these cowards.'

Vice President Mike Pence and Ivanka Trump also issued statements condemning the attacks on Obama, the Clintons and CNN.

'These cowardly actions are despicable and have no place in this country. Grateful for swift response of @SecretService, @FBI & local law enforcement. Those responsible will be brought to justice,' Pence tweeted.

Ivanka tweeted: 'I strongly condemn the attempted acts of violence against President Obama, the Clinton family, @CNN and others. There is no excuse - America is better than this. Gratitude to the @SecretService and law enforcement for all they do to keep this nation safe.'

President Trump initially just retweeted Pence's tweet, saying: 'I agree wholeheartedly!' but expanded during a White House press conference later on Wednesday.

'I just want to tell you that in these times we have to unify, we have to come together and send one very clear, strong, unmistakable message that acts or threats of political violence of any kind have no place in the United States of America,' Trump said.

Trump did not mention any of the recipients of the packages in his remarks.

'The safety of the American people is my highest and absolute priority,' he said.

His wife Melania also spoke, saying: 'We cannot tolerate those cowardly attacks and I strongly condemn all who choose violence.

'I'm grateful to the secret service as well as the federal and local law enforcement for all they do on a daily basis to keep us safe and encourage people across the country to choose kindness over hatred.'

Hillary Clinton said at a Florida fundraiser on Wednesday that 'we are fine' as she thanked the Secret Service for intercepting the device 'long before it made its way to our home'.

The pipe bomb found at CNN was safely taken away in an NYPD emergency vehicle on Wednesday to be examined by the FBI

A member of the New York Police Department bomb squad is pictured outside the Time Warner Center in the Manahattan after a suspicious package was sent to CNN

An evacuation alarm went off as CNN anchors were live on air reporting on the packages sent to Obama and Clinton

New York police block off a street after they were called to a suspicious package sent to the Time Warner building where CNN's newsroom is located

New York Mayor Bill de Blasio told a news conference that it was an 'act of terror'. He is pictured above with New York Governor Andrew Cuomo (right) and New York Police Commissioner James P. O'Neill (left)

Clinton, who was speaking at a fundraiser for Democratic congressional candidate Donna Shalala, said her family was grateful for the Secret Service's 'service and commitment and obviously never more than today'.

With the country deeply polarized under President Trump, the packages brought a new level of tension to the November 6 political contests that will decide whether Democrats can challenge the majorities now held by Trump's Republicans in Congress.

The targets are all Democrats frequently attacked by Trump online and in speeches as he defends his 2016 election victory and policies he has implemented since coming to office in January 2017.

The term #MAGAbomber was trending as the investigation unfolded.

Obama preceded him in the White House and Clinton was his 2016 election rival.

Holder was attorney general in the last years of the Obama administration.

Trump has labelled CNN the leading purveyor of 'fake news' against him, and Brennan is perhaps his most damaging critic from the national security community.

Brennan called the president's performance during a July joint news conference with Russian President Vladimir Putin in Helsinki 'nothing short of treasonous'.  

Trump often ridicules Waters, a senior Democrat, as 'low IQ' and has regularly attacked Wasserman Schultz, the former chairwoman of the Democratic National Committee, and New York Governor Andrew Cuomo.

Incidentally, Cuomo's brother, Chris, is the host of a prime time nightly talk show on CNN. 

Hillary Clinton said at a Florida fundraiser on Wednesday that 'we are fine' as she thanked the Secret Service for intercepting the device 'long before it made its way to our home'

Melania Trump strongly condemned the attempted violence to President Trump's political rivals on Wednesday at a White House press conference

Alexander Soros, the son of George Soros, said in an opinion piece published by the New York Times that his father had long faced verbal criticism and threats over his involvement in politics, 'but something changed in 2016' when Trump was elected.

'Before that, the vitriol he faced was largely confined to the extremist fringes, among white supremacists and nationalists who sought to undermine the very foundations of democracy. But with Donald Trump's presidential campaign, things got worse,' Alexander Soros wrote.

He placed direct responsibility with those who sent the devices, but added: 'I cannot see it divorced from the new normal of political demonization that plagues us today.' 

At a press conference on Wednesday, New York Mayor Bill de Blasio condemned the 'effort to terrorize' as he and fellow Democrat Andrew Cuomo appealed to all elected officials, including a veiled reference to Trump, to tone down rhetoric.

'Don't encourage violence, don't encourage hatred, don't encourage attacks on media,' de Blasio said. 'Unfortunately this atmosphere of hatred is contributing to the choices people are making.

'The way to stop that is turn back the other way, to bring down the temperature, to end any messages of violence against people we disagree with and this has to start at the top.'

Meanwhile, during Fox News' coverage of the events, former FBI assistant director Chris Swecker told the outlet that the Democrats might be to blame for the bombs.

'We're already seeing a little bit of a pattern,' Swecker said. 'They're going to be looking at this as a potential terrorist motive, whether it's on one side or the other.

'This doesn't necessarily mean someone is espousing some sort of conservative ideology and targeting Democrats. It could be someone who is trying to get the Democratic vote out and incur sympathy.' 

INNOCENT-LOOKING MANILA ENVELOPES PACKED WITH PIPE BOMBS 'INTENDED TO MAIM AND KILL'

A 6-inch pipe bomb wrapped in black electrical tape, hidden in a simple envelope with the return address of former DNC chairwoman Debbie Wasserman Schultz - this is the 'rudimentary but functional' design behind at least five explosive devices sent out to America's liberal elite in the last three days.

The devices sent to George Soros, The Clintons, The Obamas, CNN and Former Attorney General Eric Holder have all been described as pipe bombs and are believed to be the handiwork of the same serial bomber based on their design, according to law enforcement officials speaking to multiple outlets. 

Their intention was not just to create fear but to explode and maim and kill, law enforcement sources told ABC 

An envelope intended for Congresswoman Maxine Waters is also being investigated but hasn't been confirmed as an explosive 

All of the bombs were delivered in manilla envelopes with the return address of former DNC chairwoman Debbie Wasserman Schultz

They all had bubble wrap interiors and printed labels alongside six Stars and Stripes stamps 

The first pipe bomb found inside the mailbox of George Soros' Westchester mansion on Monday afternoon was a six-inches-long piece of pipe packed with explosive powder

Images of the CNN pipe bomb, showed the explosive device wrapped in black electrical tape and linked up to a cell phone detonator

It was hand-delivered but designed to look like it had come through the mail.

The Obama and Clinton packages were intercepted in mail sorting offices but it is unclear how they were delivered. 

Some have questioned whether the packages were actually sent through the postal service as that would have raised the alarm much more quickly and they wouldn't have reached their intended targets

Images of the CNN pipe bomb, showed the explosive device wrapped in black electrical tape and wired up to a digital clock counter  

It was addressed to former CIA Director John Brennan and intercepted in the media giant's mail-room and reportedly delivered by a messenger

Images showed the small makeshift device and its envelope while a NYPD press conference reported it was stuffed with gunpowder 

The bomb addressed to former Attorney General Eric Holder was somehow sent back to Debbie Wasserman Schultz's office - prompting a police investigation and evacuation of that office 

A package is currently being investigated in a Maryland sorting office, reportedly addressed to Congresswoman Maxine Waters

False alarms were called in from the offices of Governor Andrew Cuomo and  Senator Kamala Harris. Both suspicious packages were found to be innocent

Mailboxes stand outside the entrance to a house owned by Soros in Katonah, a suburb of New York City, in New York. The package was allegedly hand-delivered here

Pipe bombs are common improvised explosive devices. The pipe is sealed at both ends and packed with gunpowder. The tightly-packed design means even low grade explosives can have potentially devastating consequences and the pipe itself turns into shrapnel.

Often such devices are coated with metal projectiles like nuts and bolts creating an even more vicious impact on explosion. According to CNN, one of the four sent out this week was packed with shards of glass 

They are linked up to a fuse and most often, a timer and battery for detonation. It is unclear how the devices in this case were intended to be detonated and what the role of the digital clock taped on the side of the pipe bomb was intended to serve