FBI shoots armed man outside CIA HQ

At least one FBI agent has opened fire on an armed man outside CIA headquarters in Virginia, authorities say.

The suspect was shot and wounded after he "emerged from his vehicle with a weapon," about 6pm on Monday, the FBI said in a statement.

The unidentified suspect was taken to a local hospital and his condition wasn't immediately known.

The FBI said it is reviewing the incident.

"The review process is thorough and objective, and is conducted as expeditiously as possible under the circumstances," the FBI said.