(Updated at 5:05 p.m.) An accident  involving a Metrobus and an overturned vehicle has shut down two lanes of northbound traffic on Route 1 in Crystal City.

Police and medics are on the scene at Jefferson Davis Highway (Route 1) near 23rd Street S. One person suffered an arm injury in the accident, according to police radio traffic, and was transported from the scene in an ambulance.

Drivers should expect some traffic impacts in the area.