The Uttar Pradesh police on Thursday registered an FIR against the Samajwadi Party leader Mehtaab Aalam and the contractor of the building that collapsed in Kanpur on Wednesday afternoon killing seven persons and injuring 30.

The under-construction multi-storey building owned by the SP leader Mehtaab Aalam collapsed when the labourers were working on the sixth floor.

Deputy Inspector General of Police Rajesh Modak confirmed the number of deaths and informed that many of the injured were still in critical condition.

Most of the victims were labourers and their families from Chhattisgarh. The incident occurred on Wednesday afternoon when the sixth floor was being constructed.

All of a sudden, the building crumbled like a pack of cards and thereafter there was chaos and wails for help, an eyewitness said.