DC police investigating 'Meet the Press' incident

Gun laws in the nation's capital generally restrict the possession of high-capacity magazines, regardless of whether the device is attached to a firearm. Gregory held up the magazine as a prop for Sunday's segment, apparently to make a point during an interview, even though D.C. police say NBC had already been advised not to use it in the show.

"NBC contacted (the Metropolitan Police Department) inquiring if they could utilize a high capacity magazine for their segment. NBC was informed that possession of a high capacity magazine is not permissible and their request was denied. This matter is currently being investigated," police spokeswoman Gwendolyn Crump said in a written statement. She declined to comment further.

While interviewing National Rifle Association CEO Wayne LaPierre for Sunday's program, Gregory held up an object that he said was a magazine that could hold 30 rounds.