Story highlights Early reports indicate fragments consistent with a pipe bomb, FBI saysA nearby National Guard recruiting center vandalized a few days earlier(CNN) An explosion struck a US Air Force recruiting office in northeast Oklahoma -- the second time a recruitment center in the area was attacked in recent days, the FBI said. Bomb squads responded to the explosion in Bixby, a suburb of Tulsa, at about 10:30 p.m. local time Monday, Bixby police Sgt. No one was inside the Air Force recruitment center. Now the FBI and the Bureau for Alcohol, Tobacco, Firearms and Explosives are investigating what type of bomb was used -- and what the motive was. Early reports indicate the fragments were consistent with a pipe bomb, FBI spokeswoman Jessie Rice said, but the type of bomb has not been confirmed.

Source: CNN July 11, 2017 07:07 UTC