A 60-year-old employee was attacked with a rock by two men as they broke into a warehouse in Bentley.

Cannington detectives are investigating the violent robbery which happened at property in Ewing Street about 9.20pm on March 18.

Police said the victim was on a break and was sitting in his car outside the property when two men walked by.

One of the men looked into the warehouse then walked back to the second man with a rock. The second man approached the employee in the car and threw the rock at him.

“He has fallen to the ground,” police said.

“The man searched the victim’s pockets stealing his wallet, phone and cigarettes.

“Both men then entered the warehouse, removed a number of items and left. It’s believed they left in a vehicle.”

The victim was taken to hospital with a broken jaw and facial swelling.

About an hour after the attack, police believe a dark-coloured Ford Territory entered a service station in Thornlie.

“The driver filled up the vehicle with petrol and he drove off without paying,” police said.

This Ford Territory was stolen earlier from Erskine and was found abandoned in Wilson early the following morning.

Police have released a CCTV image of a man who they believe may be able to help with their inquiries.

People who know the man should call Crime Stoppers on 1800 333 000.