The incident occurred at Moulivakkam near Porur, about 20 km from Chennai.
23 people have been rescued so far and the injured are being admitted to the Ramachandra Medical College and Hospital for treatment. Around 22 people are still feared trapped under the debris of the residential building.
Chennai police Commissioner S George told NDTV, "The National Disaster Management team is conducting rescue work. Six workers who are trapped have been identified and we are trying to rescue them.The cause for the collapse is not clear but rescue operations will continue through the night."
Election Results for Lok Sabha Election 2019 will be out on May 23. Get the latest election news and live updates on ndtv.com/elections. Catch all the action on NDTV Live. Like us on Facebook or follow us on Twitter and Instagram for news updates from each of the 543 parliamentary seats for the election 2019