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RICHMOND, Va. (March 31, 2016) – Six people were shot at a Virginia Greyhound bus station, including two state troopers, Richmond Police Chief Alfred Durham told WTVR.

Sources told WTVR CBS 6 reporter Jon Burkett that the suspect has died. Those sources also said one of the troopers suffered life-threatening injuries.

Two of the injured people are in critical condition, police said.

Multiple sources told the station Burkett Virginia State Police were at the bus station for a training exercise when gunfire erupted.

Those sources said the civilian suspect started shooting at troopers inside the bus station. Those troopers then returned fire.

A man who stopped for a smoke break before going into the bus station, said he heard at least five to ten shots fired.

This is a developing story; refresh for updates.