A 71-year-old Maryland man was killed Monday when a truck he was driving struck the walls or top of an underpass in Southwest Washington, ejecting him from the vehicle, D.C. police said Tuesday.

The accident occurred about 2:10 p.m. and kept portions of South Capitol Street, at M Street, closed for more than five hours and caused significant backups. Police identified the driver as James Harvey Harris, of Oxon Hill, and said he died after being taken to an area hospital.

Officer Araz Alali, a police spokesman, said Harris was driving north on South Capitol Street and tried to take South Capitol Street under M Street, avoiding a normally busy intersection near Nationals Park.

Alali said the truck struck the concrete and steel underpass, but it was unclear if the truck or its cargo was too high to fit under the structure or something else happened. Alali said the impact forced Harris though the driver’s side door and onto the road. He said the truck continued to role until coming to a gradual stop.

Police said the bridge had minor damage and was inspected before lanes were reopened to traffic. The account differs from one provided by D.C. police on Monday, when they said the accident involved a truck and a car.