Police confirmed the death in a press release on Sunday morning.

A brawl involving a number of people broke out outside the Kokomo's nightclub in the centre of the city around 12.05am.

Witnesses said the bloody fracas spilled up and down the street, with screaming and shouting, scuffles and punches thrown.

It is not known yet whether weapons were involved in the incident.

Around 35 police converged on the scene from various parts of the city. It is still unsure whether anyone had been taken into custody.

The area is blanketed with CCTV cameras so this footage will be gathered as a crucial part of the ongoing investigation

Bloodied clothing and blood stains were all around the crime scene on the corner of Genge and Bunda Streets in the city centre and police erected temporary barriers to preserve the remaining evidence while AFP Crime Scene Forensics were called to take photographs and collect samples.

Around 250 metres of Bunda Street was sealed off as a crime scene this morning.

In a statement issued in the early hours of Sunday morning, police would only say they "responded to a diusturbance outside a licensed premises" which involved "a number of people".

One woman who did not view the incident directly described it as a "mad scene" and saw a body lying immobile on the ground on the pavement in Bunda Street for a lengthy period before paramedics arrived.

It is not known what sparked the incident and police said they would not comment further until later in the morning.

Senior homicide detectives were also on scene in the early hours and the area is expected to stay locked down until late morning.

Restrictions on bars and nightclubs in the ACT as a result of the COVID-19 pandemic have only recently been eased.