India, June 10 -- An eight-year-old boy died and a 45-year-old man injured after a portion of an old two-storey building collapsed on them in outer Delhi's Kamruddin Nagar area of Nangloi on Monday morning, police said.

The boy, identified by his first name Vansh, was sitting on the staircase of the building and watching something on a mobile phone when nearly 25 square yards of the upper structure, built on 190 square yards, gave way and fell on him, crushing him to death instantly, police officers said.

Initial investigations revealed that the first and second floors of the building had roofs made of stone slabs supported by horizontal iron girders. Two water tanks were kept on the first-floor roof, and constant leakage from these tan...