The FBI says the same gun was used in recent shootings at the Pentagon and the National Museum of the Marine Corps, and it's investigating whether the weapon was also used in an overnight shooting at a Marine Corps recruiting station in Chantilly, Va.

Ballistics evidence linked the Oct. 17 shooting at the privately run, non-profit Marine Corps museum in Triangle, Va., with the Oct. 19 shooting at the Pentagon, the FBI said in an announcement. No one was hurt in either incident.

Late last night or early today someone fired shots at the recruiting station. No one was injured.

The FBI said it would not immediately identify the weapon used or the caliber of the ammunition "to preserve the integrity of investigative efforts."

(Posted by Michael Winter)