India, June 16 -- The brief spell of thunderstorm on the intervening night of Saturday and Sunday led to the collapse of a 100-foot-high mobile tower in south Delhi's Safdarjung Enclave, but no injury or casualty was recorded as the incident took place at around 4am, when the road had a scarce footfall, officials and residents said.

The incident, however, led to safety concerns among the residents' welfare association, which alleged that a lack of structural safety was not heeded to by civic authorities.

Pankaj Agarwal, of Safdarjung Enclave and a convener of NCR RWAs, said: "We have been objecting to the tower from the very day it was installed as a drain passed under the site compromising the structural safety. But our objections were...