The security grid at Srinagar International Airport on Tuesday went on high alert mode after a hoax call about a possible bomb threat, officials said.

The officials said a call was received at the Srinagar airport about a bomb in the Indigo flight that had arrived here from Mumbai.

The authorities carried out a thorough search of the flight which was scheduled to take off for Delhi via Jammu at around 5.20 pm.

"However, it turned out to be a hoax," a senior official of Airport Authority of India here said.

The official said the hoax call did not affect the flight operations.

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