The Capitol Police have asked the Pentagon to extend the National Guard’s mission to protect the U.S. Capitol for an additional two months, a defense official told Reuters.

National Guard troops were dispatched to the Capitol grounds after the Jan. 6 attack by supporters of former President Donald Trump, and tall fencing has been erected to extend the security perimeter.

There are currently about 5 200 National Guard troops around the building. The mission was set to end on March 12.