IAF was tasked with the rescue operation on Monday after receiving a message about the blast near Haa in Bhutan, they said.
"A quick endurance check was made on the chopper before deciding to proceed to Haa from where five critically injured personnel with one attendant each were airlifted to Thimphu," IAF spokesperson, Group Captain Amit Mahajan, said.
Using the latest Mi-17 V5 chopper, IAF had also evacuated a critically ill person from Lunana village near Thaanza glacier at an altitude of 13,000ft in northern Bhutan on August 24, Mahajan said.