Armed robbery images released by police

Images have been released of an attempted armed robbery of a cash-in-transit van in Sydney's inner west more than three years ago.

Police released the CCTV pictures in the hope of gaining information from the public about the incident, which occurred on March 4 2013 in Glebe's Bay St.

Three men allegedly armed with rifles and a pistol approached a guard and demanded cash and access to the van before fleeing in a dark grey Audi RS6 station wagon, driven by a fourth man.

Two men have since been charged and police are seeking the other two.