Officials say a Capitol police officer was shot but not seriously wounded and the shooter is in custody as of Monday afternoon.

The Associated Press reported that Congress and the White House were on lockdown shortly before 2 p.m. Monday following reports of a shooting on Capitol Hill.

An email addressed to Capitol Hill staffers that was posted to Twitter reads: "U.S. Capitol Police are locking down the entire U.S. Capitol Complex due to a potential security threat. No one will be allowed to enter or exit any buildings. You may move about within the buildings and underground between buildings. If you are outside, seek cover."

The Log Cabin Democrat will continue to cover this developing story.