Noem’s bag was stolen by a masked man Sunday night while she was having dinner with her family in Washington, D.C.

A man in the U.S. 'illegally' was arrested for stealing DHS chief Kristi Noem’s purse in Washington, D.C., while authorities search for a second suspect.

An arrest has been made in the investigation of the theft of a high-end Gucci bag belonging to DHS Secretary Kristi Noem, a law enforcement source familiar with the investigation tells CNN.