Claims that a man was chased by two other men before he fell 30ft in Hastings are being investigated.
Emergency teams were called to the Yelton Hotel in White Rock at about 0050 BST.
Hotel staff raised the alert after the man was found with suspected spinal injuries in a car park.
Sussex Police is investigating allegations that he was chased by two men before falling. The injured man was taken to hospital for a CT scan.
Anyone who saw what happened, or who saw the man with possibly two other people in the area at the time, is asked to contact the force.