According to a statement released by the British Airways, the aircraft was fully examined by the airline`s engineers and was cleared to operate its next flight.
"No arrests have been made and enquiries continue," a Metropolitan Police spokeswoman said, adding that the drone had struck "the front of the aircraft."
The Civil Aviation Authority, UK`s aviation statutory authority, also said in a statement that flying drones close to airports was "totally unacceptable" and anyone violating the rules could face "severe penalties", including imprisonment.
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