Senate Report Details Security Failures in Jan. 6 Capitol Riot

Top federal intelligence agencies failed to adequately warn law enforcement officials before the Jan. 6 riot that pro-Trump extremists were threatening violence, including plans to “storm the Capitol,” infiltrate its tunnel system and “bring guns,” according to a new report by two Senate committees that outlines large-scale failures that contributed to the deadly assault.

An F.B.I. memo on Jan. 5 warning of people traveling to Washington for “war” at the Capitol never made its way to top law enforcement officials. The Capitol Police failed to widely circulate information its own intelligence unit had collected as early as mid-December about the threat of violence on Jan. 6, including a report that said right-wing extremist groups and supporters of President Donald J. Trump had been posting online and in far-right chat groups about gathering at the Capitol, armed with weapons, to pressure lawmakers to overturn his election loss.