Police and NSW Ambulance paramedics were called to College Street near Hyde Park and the Australian Museum just before 3.30am following reports that a man had fallen from a wall.

The man sustained serious head injuries from the fall from a height of roughly 1.5 metres, police said.

He was treated by paramedics and taken to St Vincent's Hospital, where he remains in a critical condition.

Early reports indicate the fall was an accident, with no suggestion of criminal activity, police said.

Officers from the Sydney City Local Area Command are investigating.

Police are urging anyone with information about the incident to contact Crime Stoppers on 1800 333 000.

*/ ]]>