A century-old building collapsed in south Mumbai’s congestedDongri area on Tuesday, killing at least four people as rescuers struggled toreach the 40 others who are trapped under the debris, officials said.

A toddler was among the seven people to be pulled alive fromthe Kesar bai building in Tandel Street in Abdul Hamid Durga, an area withnarrow by lanes, and rushed to a hospital. Doctors said the condition of thechild was stable.

Maharashtra chief minister Devendra Fadnavis said authoritiesare focussing on rescuing those who are trapped and that an investigation willbe launched to find the cause behind the collapse.

“It was a 100-year-old building. It was not in the list ofdangerous buildings. A developer was appointed for redevelopment. We will probeif there was any lapse on part of the developer,” Devendra Fadnavis said.Localresidents reported the incident to the police at 11:40am after they heard aloud crashing sound and saw the Kesarbai building had given way. There were atleast 13 to 14 families living in the building.