Two lanes of the Capital Beltway in Oxon Hill are closed after a car crash that killed one person Wednesday afternoon.

A car traveling south on Interstate 495 crashed over the right guardrail near the St. Barnabus Road exit, said Mark Brady, spokesman for the Prince George’s County Fire Department.

Two right lanes of the inner loop near the exit are closed as police investigate the crash. Brady said he didn’t know how long the lanes would remain closed.

The lone occupant of the vehicle was pronounced dead at the scene.