A gun -- possibly an AK-47 -- was recovered Friday night after reports of gunfire and a chase near the White House.
At least one person is still at large after the reports of gunfire at about 9:30 p.m. within earshot of Secret Service. No injuries have been reported.
Constitution Avenue was shut down at 15th, 17th and 23rd streets.
Two cars were seen leaving from the area. Police lost sight of one vehicle but they caught up with a possibly stolen Honda sedan near the Roosevelt Bridge. The gun was found inside.
The driver took off on foot. Park Police could not confirm any passengers.
Police suspect another vehicle was involved.
U.S. Park Police Sgt. David Schlosser said Friday evening that the agency received a report of shots fired near 16th Street and Constitution Avenue, NW, between the White House and the Washington Monument.
Police are looking for bullet holes and casings, and haven't confirmed that shots were actually fired. He said the White House is a fair distance away and doesn't appear to have been the focus.
D.C. police and, for a time, Arlington police joined Secret Service in the investigation, News4's Jackie Bensen reported.