Federal agents opened fire on an armed man outside CIA headquarters in McLean, Virginia, during an hourslong standoff on Monday, authorities said.

NBC News, citing two law enforcement officials, reported that an intruder had attempted to drive into the CIA facility without access at about 6 p.m. ET, and was stopped by armed guards. The CIA’s negotiation with the intruder lasted for hours, according to NBC News. 

The individual was later shot by agents with the FBI after a standoff, the bureau confirmed in a statement to USA TODAY and later posted to Twitter.