At least four persons were killed when a four-storey building at Thakurli in Thane district collapsed late on Wednesday night.
Official from the site said that nearly 20 families are feared trapped.
"The building 'Matru Chhaya' crashed at about 10.40 pm following heavy downpour. A massive relief and rescue operation has begun and so far three injured persons have been rescued and rushed to the hospital," Regional Disaster Management Committee (RDMC) chief Santosh Kadam said.
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