A suspect who barricaded himself an Adelphi apartment was transported from the building in an ambulance shortly before 6 a.m. Tuesday.
Prince George's County Police responded to the barricade in the 1800 block of Grenwich Wood Drive in Adelphi late Monday night.
News4's Melissa Mollet reports that U.S. Marshals arrived at the apartment to make an arrest Monday night, but the suspect barricaded himself inside the apartment -- he was armed but had no hostages.
It's possible the suspect was being arrested by U.S. Marshals for involvement with a series of carjackings, Mollet said. The extent of the suspect's injuries are not yet known.
Stay with News4 and NBCWashington.com as this story develops.