District police have arrested a 21-year-old man and charged him with robbing three 7-Eleven stores in Northeast Washington. Police said they are investigating links to other hold-ups in Prince George’s and Montgomery counties.

The suspect was identified as Phillip Liverpool of Southeast Washington. Police said he was arrested Thursday and charged with three counts of armed robbery. He could be arraigned Friday in D.C. Superior Court.

Police said he is charged with robbing convenience stores on Jan. 25 in the 1900 block of Rhode Island Ave. NE; on Jan. 31 in the 7400 block of Georgia Ave. NE; and on June 12 in the 2500 block of Benning Road NE.

Authorities distributed surveillance video of the June 12 holdup, which occurred about 3:05 a.m. The video shows two people entering the store, their heads covered in hooded sweatshirt, and then leaving. One is carrying a cash register drawer.

Police did not say whether a second person is being sought in all the robberies.