Authorities say a cleaning crew found a threatening letter on a parked US Airways aircraft, but no explosives or other dangers were discovered.

Greg Meyer, a spokesman for Fort Lauderdale-Hollywood International Airport, says a member of the crew came across the note early Monday morning. The plane had arrived hours earlier from Charlotte, N.C., and no passengers were aboard.

Meyer said the note said something about damaging the plane, but he did not specify the exact message.

Security officials used dogs to check the plane. The Transportation Security Administration says the plane was cleared and later returned to Charlotte as scheduled.

A phone message left with Tempe, Ariz.-based US Airways was not immediately returned.