ALEXANDRIA, Md. - Police say a man is in custody after a standoff with police at the Belle Haven Marina in Alexandria.

Police were called to the scene Friday evening for a report of shots fired. When police arrived, a man armed with a gun jumped into a dingy and made his way out to a sailboat anchored in the Potomac River. Police evacuated the marina and spent several hours trying to make contact with the man.

The man was later taken into custody without incident. A spokesman for the U.S. Park Police identified the man Saturday as 44-year-old John Watson of Virginia. Police say Watson will be arraigned Monday on assault charges.

There were no reports of injury. Police have not said what led to the shooting.