Manhunt underway for suspect wanted over Melbourne stabbing

Police have launched a manhunt for the suspect wanted over a fatal stabbing in Melbourne's CBD on Monday.

Homicide Squad detectives looking for Marco Deng, a 22-year-old believed to be behind the attack of a man on Market Street about 5am on June 22.

The victim, a 21-year-old Kurunjang man, was stabbed during the incident and died in hospital later that day.

Following the altercation, police allege Mr Deng fled the scene.

Police believe the two men involved in the incident were known to each other.

"We're seeking assistance from anyone who may know his whereabouts in particular his family, friends or associates," Detective Inspector Tim Day said.

"I'd also like to make it clear that if he's being harboured by someone, that person risks committing a serious offence as well.

"We are also calling on Marco to make contact with police himself, police are actively searching for him and it will only be a matter of time before we catch up with him."

Mr Deng is described as being 180cm tall with a medium build, brown eyes and short dark hair.

Police have released an image of him in the hope someone can provide information regarding his current whereabouts.

Mr Deng is known to regularly visit the Brimbank area and his last known address is in Burnside Heights

Anyone with information has been urged to call Triple Zero or contact Crime Stoppers.