Airport spokesman Rich Johnson said Wednesday that someone called the airport making a "very specific" threat but did not elaborate. He said passengers inside the terminal were herded onto the tarmac and that arriving planes are staying parked away from the gates.
Johnson says the evacuation order was called at 2:35 p.m. CST. He didn't immediately know how many flights are affected or how many passengers were inside the terminal at the time.
San Antonio police and several federal agencies are investigating the threat.