The Calvary Coach bus involved in the crash on Soldiers Field Road.

The bus was towed to a service center in Arlington.

Raymond Talmadge, owner of Calvary Coach, told a television station that Jackson may have been checking his GPS at the time of the crash.

By morning, the crash site was cleared.

Emergency responders worked to free people trapped on the bus.

The bus carried students and chaperones from Pennsylvania who had toured Harvard.

At least 34 people were injured, including one with life-threatening injuries and three with serious injuries.