A spokesman for Stansted Airport said passengers were being taken off the plane.
"They will be taken to a reception centre in the airport where police may wish to interview them about what they have seen. At some point police and the airline will arrange for their onward transportation to Manchester."
A Manchester Airport 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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Members of the London community have rallied round to offer their help to residents of the evacuated Chalcots estate in Camden.
Evacuated residents have expressed anger and confusion at unexpectedly being told they had to leave .
Camden Council is evacuating four tower blocks in the Chalcots estate in north London, to allow "urgent fire safety works" to take place.