A Deogarh-bound IndiGo flight 6E 6191 from Delhi was diverted to Lucknow following a specific bomb threat on Monday.
The Airlines informed that all the necessary security protocols were followed and the aircraft was cleared for takeoff.
IndiGo is following the rules of the security agencies in the probe, it said.
"Flight 6E 6191 operating from Delhi to Deogarh was diverted to Lucknow following a specific bomb threat. All necessary security protocols were followed and the aircraft was cleared for take-off later. IndiGo is following the rules of the security agencies in the probe," the airline said in a statement.
The flight landed safely at Lucknow airport at 12:20 pm and was taken to the isolation bay.
The plane was later allowed to take off again at 2:55 pm, an official said.
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