A tweet sent from the verified U.S. Capitol Police account said that officers are responding to reports of a ramming of two officers at one of the vehicle access points to the grounds.
Police said a suspect is in custody and both officers are injured.
“All three have been transported to the hospital,” the tweet said.
No information is yet available on the details of the apparent incident.
The Associated Press reported that at least one officer was in serious condition, while the driver was in critical condition, citing two law enforcement sources.
According to that report, police said all Capitol buildings were being locked down “due to an external security threat” and staff members were told they could not enter or exit the buildings.
A law enforcement official cited in that report said officers were responding to a report of a possible shooting on a street near the Capitol complex. The official could not discuss an ongoing investigation publicly and spoke to The Associated Press on condition of anonymity.
The apparent lockdown comes nearly three months after violent pro-Trump mobs stormed the U.S. Capitol buildings in an insurrection aimed at disrupting the certification of Electoral College votes.
U.S. President Joe Biden won that election.
Earlier in March, U.S. Capitol police said that they would begin scaling back fencing put in place to cut off pedestrian and vehicle traffic to the buildings following the insurrection.
The Associated Press at the time cited Timothy Blodgett, the acting House sergeant-at-arms, as telling members of Congress that the decision came following advice from Capitol police that “there does not exist a known, credible threat” to warrant keeping the barrier in place.
The decision prompted strong bipartisan criticism.
Five people died after the pro-Trump mob stormed the U.S. Capitol on Jan. 6, 2021.
Former U.S. President Donald Trump was impeached by the House for inciting that mob.
The Senate acquitted him after Republicans opposed the impeachment.
Security expert breaks down what happened at the U.S. Capitol and what needs to change
With files from The Associated Press.
— More to come.
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