Houston Officer Fatally Shoots Armed Assault Suspect on Bus

A Houston police officer shot and killed an armed assault suspect on a transit bus Tuesday after the man

 beat a security guard and fled with her gun, police said.

The episode began about 2 p.m. when a man attacked a security guard outside a downtown business and fled with her handgun, Police Chief Art Acevedo said. Meanwhile, a Houston port police sergeant had just dropped off his personal vehicle for servicing and was walking to a nearby bus stop when the guard told him of the attack, Acevedo said.

A witness on a bicycle approached and told the sergeant that he had seen the beating and saw the suspect flee on foot and board a nearby transit bus. The bus, which already had the driver and three passengers aboard, was evacuated immediately, leaving the suspect alone.