Protesters defied curfews across the United States as leaders scrambled to stem anger over police racism while President Donald Trump rejected criticism over his use of force to break up a peaceful rally.

Standoffs between police and demonstrators stretched into the night in cities from New York to Los Angeles over the death of George Floyd, an unarmed African-American man whose killing has brought once-in-a-generation protests to the nation for the past week.

But there were fewer reports of the looting and violence that had soured street demonstrations in previous nights.

Tens of thousands gathered earlier Tuesday in Houston to pay a hometown tribute to Floyd, who grew up in the Texas city and is to be buried there next week.

“Today is... about George Floyd’s family — we want them to know that George did not die in vain,” Mayor Sylvester Turner told an estimated 60,000 people.

A tearful Roxie Washington, the mother of Floyd’s six-year-old daughter, told a news conference she wanted “justice for him because he was good.

“No matter what anybody thinks, he was good.”

In New York, which on Tuesday prolonged its first curfew since Second World War for the full week, AFP reporters saw hundreds refusing to go home after the 8:00 p.m. cutoff, instead chanting slogans and peacefully walking the streets in Manhattan and Brooklyn.

Hours after the curfew, Mayor Bill de Blasio said it was a “very calm situation,” a day after many Manhattan luxury stores were looted.

“So far, the curfew is certainly helping, based on everything I’ve seen in Brooklyn and Manhattan over the last three hours,” he tweeted.

Minnesota took one of the first concrete actions to address the grievances behind the uprising, which began after Floyd’s death on May 25 in the State’s largest city Minneapolis.

Civil rights investigation

The State launched a civil rights investigation of the Minneapolis Police Department, looking at possible “systemic discriminatory practices” going back 10 years, Governor Tim Walz tweeted.

Former President George W. Bush called on the U.S. to examine its “tragic failures” and to “listen to the voices of so many who are hurting and grieving.”

And in Los Angeles, one of dozens of cities hit by unrest, police officers and Mayor Eric Garcetti dropped to their knees in a symbolic act of solidarity as they met marchers led by African-American Christian groups.

“A black face should not be a sentenced to die, nor to be homeless, nor to be sick, nor to be underemployed, nor to be under-educated,” Mr. Garcetti told them, inviting the leaders into City Hall for a discussion about the issues.

In Washington DC, thousands returned to the streets Tuesday for a peaceful “Black Lives Matter” march.

Hours after the 7:00 p.m. curfew protesters could be heard chanting, as National Guard troops stood on the streets near the White House and helicopters hovered above. Broadcast footage showed police firing tear gas shortly after midnight, but the situation appeared to be calm overall.

“I’m just tired, essentially, of being scared of police, of not getting justice,” said Jada Wallace, an 18-year-old protester.

In the same place on Monday, federal police had abruptly opened tear gas and fired rubber bullets to break up a non-violent protest, clearing a path for Mr.Trump to stroll outside for a photo-op at a historic church damaged the previous night.

The move was loudly condemned by religious leaders, the President’s political rivals, and onlookers around the country.

‘People liked my walk’

But Mr. Trump, who has rejected the traditional presidential role of healer, voiced glee on Twitter over the response in Washington and accused the leadership of New York — led by the rival Democratic Party — of succumbing to “Lowlife & Scum.”

“Overwhelming force. Domination,” he wrote, adding: “Washington, D.C., was the safest place on earth last night!”

He pushed back against the criticism later on Twitter, writing: “You got it wrong! If the protesters were so peaceful, why did they light the Church on fire the night before? People liked my walk.”

Joe Biden, Mr. Trump’s presumptive Democratic rival in November elections, denounced the crackdown as an abuse of power and promised, if elected, to tackle the “systemic racism” in the country.

“Donald Trump has turned this country into a battlefield driven by old resentments and fresh fears,” Mr. Biden said in a speech in Philadelphia.

In his first comments on the unrest, Pope Francis said “we cannot tolerate or turn a blind eye to racism” but also condemned the violence.

The U.S. also faced unusual, if polite, criticism from some international allies, including Germany, Britain and Australia.

German Foreign Minister Heiko Maas called the anti-racism protests “understandable and more than legitimate.”