At about 11 a.m. today, a gunman boarded a DART bus in Richardson, opened fire and led police on a multi-city chase. Three officers were wounded and the gunman was killed.

The driver of the bus was ordered at gunpoint to drive to an undetermined location. According to a report by NBC, there was only one other passenger on the bus at the time. In a Twitter post, Garland police said that the bus traveled through multiple cities including Rowlett, Garland and Rockwall, with the gunman firing at the officers giving chase. 

After spiking the bus tires, Garland police said, the chase came to a stop on the President George Bush Turnpike, between Highway 66 and Liberty Grove. The gunman was shot during a shootout with police and later pronounced dead at a local hospital. The identity of the gunman has not yet been released, and the investigation is ongoing. The stretch of turnpike has been temporarily shut down while police investigate the scene. 

In a later Twitter update, Garland police announced that one DART officer and one Garland officer had been shot in the exchange of gunfire, but both received non-life-threatening injuries. A Rowlett officer was also injured after his car window was shot out by the gunman. No other injuries — either of the bus driver, passenger or any other officers — have been reported.