A deadly building collapse in northeast Delhi's Harsh Vihar has claimed the lives of a father and son after an overnight rescue operation. The incident occurred in the Milan Garden area on Sewa Dham Road on Sunday evening. Police identified the victims as Chanderpal, 60, and his son Vijay Kumar, 33. Both were reportedly involved in the construction work and were trapped beneath the debris. They were rescued and taken to hospital, where they were declared dead.