A man with a handgun and wearing a surgical mask over his face walked into a Rite Aid drug store in Northeast Washington on Sunday night and shot an employee in the leg, D.C. police said Monday.

Police said the attack occurred shortly before 9:30 p.m. inside the store in the 1400 block of Rhode Island Ave. A police spokesman said the victim was not seriously injured.

D.C. Police Cmdr. George Kucik said investigators have little information. He said detectives do not know a motive, but that “we have no indication it was a robbery.”

Authorities released a video showing the gunman walking into the Rite Aid. He’s seen walking fast while wearing a white, black and yellow striped long-sleeve shirt, blue jeans a white baseball cap. He stands between 5 feet 8 inches and 6 feet tall.

Police said they consider the man armed and dangerous, and anyone who recognizes him should call 202-727-9099 or text the Police Department’s tip line at 50411.

This post has been updated.