A Navy police officer was killed in a single-vehicle crash in Charles County, officials said.

Maryland State Police said the crash occurred around 2:30 a.m. Wednesday on the highway near Chicamuxen and Sweden Point roads.

Police said a Ford Taurus went off the road for “unknown reasons” and crashed into a tree, which fell on top of the car, and the vehicle caught on fire. The driver was pronounced dead at the scene.

Some of the roads in the area were closed for roughly four hours.

Authorities later identified the driver as Anthony Oglesby Jr., 34, of Bowie, Md.

State police said in a statement that Oglesby was a sergeant for the U.S. Navy Police and was on duty at the time. He was driving a marked patrol car.

The incident remains under investigation. Police said his body was sent to the Office of the Chief Medical Examiner for an autopsy.