The off-duty officer who shot a man at a Prince William County Wal-Mart on Thursday was a Secret Service officer, county police and the Secret Service confirmed on Friday.

A Secret Service spokesman declined to comment on whether the officer was still on active Secret Service duty, and said that Prince William County police are investigating the shooting, which was not fatal.

According to county police, the officer was at the Wal-Mart in Woodbridge when a man with hammers in each hand started breaking jewelry cases, then fled the store.

The officer followed the man to the parking lot, issued commands and then shot the man when he did not obey.

Jonathan Perok, a county police spokesman, declined to discuss the nature of the commands that the officer gave or the condition of the man who was shot.