More On: Guam National Guard members visit Marjorie Taylor Greene’s office after CPAC gaffe National Guard head objected to extension of US Capitol deployment Pentagon extends National Guard protection at US Capitol, reduces number of troops All quiet at the US Capitol despite ‘possible plot’ to breach building A motorist mowed down two cops outside the US Capitol and was shot dead by police after smashing into a barrier and emerging with a knife on Friday afternoon, according to officials and reports. All three were taken to the hospital — with the suspect in custody — as the building was placed on lockdown following the chaos that erupted around 1 p.m. The unidentified suspect later died, according to ABC News, which also said one of the cops was in critical condition. The incident took place at a vehicle checkpoint on the north side of the Capitol along Constitution Avenue in Washington DC, police said. Sources told NBC News that the driver got out of the car with a knife after hitting the officers, then was shot. Cellphone video clips showed a helicopter landing near the Capitol before taking off a short time later. A photo also shows a dark sedan with its front end crumpled against a white metal, pop-up barricade with the words “STOP” in red. The driver’s door and trunk were also open as authorities gathered around a band of yellow caution tape. There were unconfirmed initial reports of a shooting. The incident took place amid heavy security put in place following the deadly Capitol riot on Jan. 6.