(CNN) A Turkish Airlines flight from Houston to Istanbul was back on its journey after being diverted to Ireland for hours because of a bomb threat, the airline and Irish police said.

Turkish Airlines Flight TK34 was diverted to Shannon Airport in Ireland on Sunday morning because of a "bomb alert," the airline said. The Boeing 777 landed safely and all passengers and crew disembarked.

The passengers were moved to a secure area of the airport, officials there said in a statement. A lengthy sweep of the plane found no explosives, police said.

Turkish Airlines confirmed that the passengers reboarded the plane and the flight continued to its destination.

No details of the threat were released,and no arrests were made, police said.

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