WASHINGTON (AP) — Officials say a U.S. Capitol Police officer has been shot at the Capitol Visitor Center complex, and the shooter has been taken into custody.

The police officer who was shot was not believed to be seriously injured.

It occurred in the Visitors Center of the sprawling Capitol Complex. Staffers, reporters and others were told to “shelter in place” and not allowed to leave their offices. The White House and the Capitol complex were put on lockdown.

The events unfolded with Congress on recess and lawmakers back in their districts.

Capitol Police did not immediately return calls and no further information was available.