WASHINGTON (AP) — A man who said he was investigating a conspiracy theory about Hillary Clinton running a child sex ring out of a pizza place fired an assault rifle inside the Washington, D.C., restaurant on Sunday injuring no one, police and news reports said. The Comet Ping Pong is in a neighborhood of well-tended private homes and apartment buildings on leafy streets that lead to a mix of shops, restaurants and the Politics and Prose book store. The Comet, its owner, staff and nearby businesses were caught up in an onslaught of conspiracy theories and fake news during the often contentious presidential campaign and were subjected to social media attacks and death threats, the Post reported.