'Just beautiful little kids': Woman, three children found dead at Tullamarine property

Victoria Police's acting Deputy Commissioner Robert Hill said the investigation was in its very early stages.

"We know that it involves a husband, a wife and three children. The husband has survived, the wife and three children are now deceased. Investigators do not believe there are other parties involved at this stage," he said.

"Victoria Police does not seek any other person. It's very important we do not speculate."

"It is a tragic event to lose life ... but when it involves three children, the second event that occurs this week where we saw the loss of children in horrific circumstances, it does impact on the community of Victoria," Mr Hill said.

Northwest Metro Acting Assistant Commissioner Mark Galliott said there were many questions yet to be answered.

"Police will be there in the community, processing the scene throughout the night, so we get these answers," he said.

Mr Galliott said the man assisting police had contacted emergency services and had spoken to police and provided an account of what happened.

When asked if the man was a suspect, Mr Galliott said he was a person of interest who was assisting police with their inquiries.

Mr Hill said he would not comment on the nature of the injuries of the deceased. He also said he did not expect charges to be laid tonight.

"We don't know the exact details of how this transpired. There are many scenarios we need to explore. I need to make it clear ... we should not assume culpability on the basis [that] we have a male assisting us with our inquiries. We need to understand the facts."

Dozens of police officers and several ambulances are at Burgess Street, which has been closed to traffic. A crime scene had been established at the property, and the homicide squad are in attendance.

A woman was led past the police tape and into a property by officers just before 4pm. The woman had pulled up to the street minutes earlier, before talking with police. She became distressed and was comforted by officers before escorted into the street by detectives.

Neighbour Tara Jenkins, who lives around the corner in Fisher Court, said she and her six-year-old son would often see the woman who lived in her home at a nearby park with her three children.

"I'm absolutely gutted," Ms Jenkins said. "It’s devastating.

"Those kids were so young, just beautiful little kids.

"[Their mother] was always alone with them and was a very loving mother. We would often say hello to each other as our kids played. She was always really cheerful and kind ... just a lovely woman."

A distressed next-door neighbour, who did not want to be named, said that he had gone outside mid-afternoon to see what was happening, and police told him to stay inside.

"It's very shocking, believe me," he told The Age.

He said the people who lived in the home were "nice and friendly and polite".

"[They are] very quiet," he said.

More to come