Metro Police are still searching for people involved in a downtown Nashville fight early Saturday after a man was left with a head injury and later pronounced dead.

Nicolas Christian, 30, died at Vanderbilt University Medical Center after he was hospitalized with a life-threatening head injury from a 3 a.m. fight on Saturday near the intersection of 2nd and Commerce streets.

According to police, Christian was involved in fights with several individuals.

"At one point he was knocked to the ground and, while down — perhaps unconscious, was continuously punched before a witness intervened," a police statement said.

Police released several surveillance photos on Saturday afternoon.

Members of the public are asked to contact Crime Stoppers at 615-742-7463 if they recognize anyone in the photos or have information about the fight.

People with photos or videos of the encounter are also asked to contact Crime Stoppers.

Reach Lizzy Alfs at lalfs@tennessean.com or 615-726-5948 and on Twitter @lizzyalfs.