Flights Thursday morning have been briefly stopped at San Diego International Airport.
Harbor Police Sergeant Jose Torres tells San Diego's Morning News the stop was due to a security breach.
"Three passengers exited terminal one for a smoke break, they were previously screened, they attempted to re-enter the same door they exited which is not a designated entry point, and that triggered a security alarm."
KOGO's Laura Cain is on board a plane that can't take off because of the security breach and told us that "no planes are taking off, and no planes are landing at the moment."
Stay with KOGO for updates. This is a developing story.