Police believe a fatal stabbing in St Albans was not a random attack, and have issued a warrant for a 30-year-old friend of the victim.
Detectives want to speak to Vatthana Chounlamountry, who is believed to have fled the scene of a fatal attack on Adams Street in a black 2008 Mazda CX7 about 4.45am on Tuesday.
Police believe Mr Chounlamountry may have forced his way into the house where a 22-year-old man was attacked. The man, who shared the home with his mother and uncle, died from his wounds at Sunshine Hospital hours later.
Mr Chounlamountry, of Burmese heritage, was known to the man, Detective Inspector John Potter said.
"We believe they are known to each other and have been in some sort of a friendship or relationship," he said.
Police attended Mr Chounlamountry's St Albans home after the attack and discovered he had left, Detective Inspector Potter said. He was already known to police.
"Police are appealing for Mr Chounlamountry to hand himself in," he said. "His current whereabouts are not known.
"Mr Chounlamountry is wanted in connection with the death of another man so we're obviously concerned with the fact that he's still out in the community. He possibly is a danger to others."
There's no indication he has been able to leave the country, although he is known to have associates in New South Wales, Detective Potter said.
Earlier on Tuesday, police revealed they did not believe the attack was random, confirming a neighbour heard the sounds of a fight at the time. .
Nick Blake woke up to get cigarettes about 4.30am when he saw a woman yelling at a man outside the house in Adams Street.
"I heard a bit of yelling, a woman yelling and a bloke jumped into a car and took off," Mr Blake said.
He said he heard the woman screaming "f--- off".
Police made an urgent appeal for Mr Chounlamountry to come forward as they search for clues in the investigation into the stabbing and have released his image in the hope someone can provide information on his current whereabouts.
Police described Mr Chounlamountry as Asian, 160cm tall, of a thin build with a shaved head and brown eyes. He was last seen wearing a black hooded top, light-coloured pants and sneakers.
Mr Chounlamountry is believed to still be with his black Mazda which has the registration WUA 161. Police have urged anyone who comes into contact with Mr Chounlamountry or the vehicle, not to approach, but to to call triple zero (000) immediately.
Speaking earlier on Tuesday, Inspector Gilbert said up to six family members were in the house at the time, including children.
"Obviously the family are quite distraught. They're going to be very upset for some time to come and it's important to support them."
Another neighbour said she heard the sounds of a car revving at the time of the incident.
"I heard something, I don't know if it was a scooter or car or what," she said.
"I thought maybe it was someone stealing a car."
The incident hit too close to home for Aleksandar Zdrnja, 25 - and not just because he lives in the same street.
Two years ago, someone broke into his home while he was sleeping and stole his mother's jewellery.
He shuddered at the thought of what could have happened if he had woken up and confronted them.
"It could have happened to me, I'm just shocked," he said.
Reciza Schopov, who also lives in the street, said she was now scared to stay in her neighbourhood.
"I feel terrible," she said. "I'm just so sorry for these people."
Police are keen to speak with any neighbours or witnesses who may have seen or heard anything suspicious in the area.
Anyone with information is asked to contact Crime Stoppers on 1800 333 000.
with Tammy Mills, Caroline Zielinski and Jessica Wright