(Reuters) - Houston police dispatched a bomb squad on Tuesday to George Bush Intercontinental Airport to investigate a possible bomb threat against a Delta Air Lines plane, a police spokesman said, but no device was found on the airplane.

Bill Begley, spokesman for the Houston Airport System, said the plane had since departed the airport.

“It is a non-specific threat,” he said. “We worked with the airline and with TSA to pull the passengers and baggage off the plane and re-screen them.”

Officials at Atlanta-based Delta DAL.N, the No. 2 U.S. carrier by traffic, said the affected passengers were aboard flight 227, an MD-88 aircraft flying between Houston and Atlanta.

Passengers were rescreened and the flight departed after a short delay due to a threat deemed by authorities as being non-credible, the airline said in a statement, but no information was given as to the number of passengers and crew on board.