Essex Police said the plane, which had departed from Lahore, has landed at Stansted.
It is understood the incident happened around 10 minutes before the plane, flight number PK709, was due to land in Manchester at 2pm.
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Police said seven men were arrested during West Ham's EFL Cup fourth round win over Chelsea at the former Olympic Stadium.
Damon Smith, 19, has been charged with making or possessing an explosive substance with intent to endanger life.
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