Police are looking for a group of people who descended upon a convenience store in Southeast D.C. and perpetrated a flash mob robbery Saturday.

According to a news release from the Metropolitan Police Department, a group of subjects entered the business at 1535 U Street SE, began taking items, then left without paying for them. The robbery was filmed by surveillance cameras.

A member of the group then allegedly assaulted the store’s owner with a piece of lumber. The suspect is described as a black male last seen wearing a blue shirt with a Nike emblem, a denim vest, a white sweatband on his head, denim shorts, and tennis shoes.

At the height of flash mob robbery panic in 2011, Mayor Vincent Gray released a statement saying he would “not tolerate such reprehensible behavior here.” In January 2012, Councilmember Phil Mendelson proposed changing the city’s larceny statutes so an individual who participated in a flash mob robbery could be charged with stealing the aggregate value of all goods stolen by the group. At a June 2012 hearing about the bill, Laura Hankins of the D.C. Public Defender’s office said the legislation “was unconstitutional, since it would violate the due process clause by charging an individual for a crime they didn’t specifically commit.” The legislation didn’t make it out of committee.