Exterior of Comet Ping Pong photographed in Washington, DC. (Photo by Deb Lindsey For The Washington Post).

D.C. Police responding Sunday to a report of a gunman at a popular pizza restaurant in Northwest Washington detained a man armed with an assault rifle, according to a police spokeswoman

Police received a call about a man with a weapon a just before 3 p.m., said Aquita Brown, a spokeswoman for the department. Officers responded to the scene at Comet Ping Pong, a pizza restaurant on Connecticut Avenue with ping-pong tables that is popular with families.

She said a weapon has been confirmed but there were no reports of injuries and no shots fired.

On social media, some people reported a man with a rifle: