Police say they're looking for an armed robber who exchanged gunfire with an officer, leaving a bystander seriously hurt, in the Washington suburb of Springfield, Virginia.

Fairfax County Police said in a statement the bystander was driving by Saturday and was hit by a bullet apparently fired by the robbery suspect. They called the injury life-threatening.

Police were called shortly after noon to a jewelry store at the Brookfield Plaza shopping center. Police say an officer saw a man exit the store and confronted him.

Police say the suspect fired at the officer, who shot back.

They say the robber fled in a car that crashed, then carjacked another vehicle, crashed that one, and ran away.