Gunman killed a police officer at a bus station in US

A gunman approached a trooper and shot him in the chest in a bus at greyhound station where several Virginia State troopers were conducting a training exercise. Other troopers who are saw the incident fired back and killed the gunman. During the crossfire, two pedestrian were hurt and taken to the hospital for treatment.

According to the police, the gunman was unidentified and the reason for killing the trooper is unknown. Greyhound issued a statement on Thursday afternoon, saying the Richmond bus station would be closed until further notice.