There have been news reports of a woman taken to the hospital from the House. She was evidently Jack Kingston staffer, his office blogs .

WASHINGTON—The following statement can be attributed to David All, spokesman for U.S. Rep. Jack Kingston, R-GA, regarding a member of Congressman Kingston’s staff taken to the hospital during Rayburn lockdown:
“This morning, a member of Congressman Kingston’s staff was in the House Staff Gym when the Rayburn House Office Building was put under lockdown due to alleged gun shots. Under guidance of law enforcement officials, the staffer was taken via ambulance to the hospital. She was not injured or shot, just a little shaken up under the circumstances.
“We have been in contact with our colleague and she is doing well.
“Congressman Kingston is aware of the situation. He has encouraged us to remain cooperative with the Capitol Police as they work to resolve this situation.�
The House Staff Gym is located on the second floor of the parking garage of the Rayburn House Office Building which is five floors below Congressman Kingston’s office.