The deceased has been identified as Pradeep Kumar while his relative, 29-year-old Vipin, is recuperating in a hospital.
According to the police, the two storeyed building was built in the early 1980s. The roof of the second floor flat was in a dilapidated condition and needed repair but it was ignored by the owner which lead to the mishap.
The roof suddenly caved in around 10 PM last night leaving Pradeep and Vipin trapped.
The building belonged to Ashok Ganwani, a property dealer. Pradeep Kumar worked for him and lived in the second floor of the building.
"We have registered a case of death due to negligence in this connection and further investigations are on," said Deputy Commissioner of Police (West) Ranvir Singh.