NEW DELHI, June 2 -- It was a phone call and a wristwatch that helped save 25-year-old Kshitij Pratap after he was trapped beneath the rubble of the building collapse in Saidulajab that killed six people and injured 10 others on Saturday.

Speaking from his hospital bed at the AIIMS Trauma Centre, Pratap recounted how he survived after a multi-storey building collapsed onto a canteen where he was having dinner.

"I tried desperately to free myself but couldn't move because my leg was trapped under heavy rubble. One of my hands was outside the debris, and the tin shed created a small air pocket that allowed me to breathe," he said.

Realising the gravity of the situation, Pratap managed to pull out his mobile phone and call a friend, infor...