VIDEO: Authorities are investigating a serious injury crash involving a light-rail train in Mesa Saturday afternoon. Mesa firefighters say a 60-year-old man was extricated from his vehicle and rushed to the hospital in critical condition after the collision near Stapley Drive and Main Street. Crews say no one inside the train was hurt. The westbound lanes of Main Street were closed while police worked to clear the scene. The cause of the crash is under investigation. The victim is not being identified at this time.