A Manchester Airport spokesman said the Pakistan International Airlines (PIA) flight had been due to land at 1:30pm, but was diverted to London Stansted "where the authorities are investigating".
The spokesman said: "The plane - flight number PK709 - was travelling from Lahore and had 297 passengers on board.
"For further information for friends or family who were due to meet the flight at Manchester please call 0800 140 4007".
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