Esperance Detectives are investigating a serious assault that occurred on Andrew Street on Saturday morning, December 8, and left a man with serious head injuries.
About 1.30am, two men were waiting for a taxi on Andrew Street when a taxi pulled alongside them.
It is understood the pair began to argue, with the victim getting inside the taxi before getting back out again.
The second man allegedly assaulted the victim, causing the victim to fall backwards with his head hitting the pavement.
The man allegedly left the scene, heading towards Pink Lake Road as the taxi driver called Esperance Police and an ambulance.
The victim is in a serious condition and has been transferred from Esperance Hospital to Royal Perth Hospital.
Anyone with information that may help detectives are asked to contact Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au