After the Jaipur blasts, a red alert has been declared at the airport and security agencies have increased all checks. A few hours later the call was traced to Shahdara.

“The call was made by a 27-year-old man, Radhe Shyam, who is pursuing his MA through correspondence from Himachal University. The man has been undergoing psychiatric treatment at Dr Ram Manohar Lohia Hospital,” said a senior Delhi Police officer.

Even as the Delhi Police was tracing the call, the Bomb Threat Assessment Committee convened a meeting.

“We followed our usual drill as the caller had merely stated that a bomb has been placed at the airport. He did not even specify which terminal or which part,” said a senior CISF officer.

A dog squad made a thorough search of all the terminal buildings and extra vigil was taken in checking the luggage. “No building was evacuated and there was no situation of panic,” added the CISF officer.

Shyam’s family members were present in the house when he made the prank call using his elder brother’s cell phone.