BROKEN ARROW, Okla. (AP) — Police in Broken Arrow say a school bus driver who died after crashing the bus into several parked cars may have suffered an undisclosed medical condition. Police say there were no children on board when the bus went out of control and collided with three unoccupied cars in the parking lot of a local business just after 6:30 a.m. Monday. Cpl. Leon Calhoun says 68-year-old Gary Wagner was driving the bus when it crashed and that Wagner died later at a Tulsa hospital. Calhoun says there were no other injuries related to the accident and that Wagner's death appeared to be related to the medical condition.