3 Sydney fuel stations robbed in 3 hours

Police believe three armed robberies at service stations in Sydney's west by three men over a three-hour period could be linked.

During the early hours of Wednesday, petrol stations in Bonnyrigg Heights, Cabramatta and Prairiewood were robbed by men with handguns and metal bars.

In all three incidents, two or three men, entered the services stations demanding money.

The Bonnyrigg Heights service station was robbed just after midnight (AEDT), in Cabramatta at 2.30am and at then at 3am the service station in Prairiewood was targeted.

None of the employees at the three stations were injured.

Police are looking for three men of Pacific Islander appearance.