The attacker struck shortly after 2 am Sunday in the technical area of the airport.
Some were injured in the blast. However, it is not yet clear how the explosion occurred.
Forensic experts and a bomb squad arrived at the scene.
Meanwhile, Jammu and Kashmir police arrested a terrorist with five kilograms of improvised explosive devices from the Narwal area of Kashmir. Police said they are investigating.
Also read: Closing concessions in the state; Prayers can be performed in places of worship on Sundays.
This is breaking news. No details available.