Greater Manchester Police arrested the man after the plane, which was escorted by British fighter jets, safely landed at Manchester Airport.
British armed police took the passenger off the plane shortly after it landed.
"An incoming plane has been escorted into the airport by the Royal Air Force as a result of information received by the pilot about a possible device on board," Chief Supt. John O'Hare said in a statement.
"We don't know how genuine this threat is but it is absolutely vital we deal with the situation as a full emergency," he added.
The plane was a Qatar Airways flight from Doha to Manchester, carrying 269 passengers and 13 crew members, according to a statement from the airline.
The crew received a threat about a possible device on the plane, and Qatar Airways alerted U.K. authorities.
"The crew is now fully assisting police at the airport with their inquiries," read the airline's statement. "The safety and well-being of our passengers and crew is our top priority."
The airline will not comment further, as police are investigating.
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