Pune Police on Friday registered FIR against a contractor and detained three people in connection with the death of five labourers following the collapse of a steel structure at a construction site last night. Prime Minister Narendra Modi expressed grief over the loss of lives in the incident. Maharashtra Deputy Chief Minister Ajit Pawar on Friday announced an ex-gratia of Rs 5 lakh each for the families of the deceased and also ordered an investigation into the incident. The primary investigation suggests that the incident happened due to a lack of precautionary measures at the site. Watch full video.