A portion of a three-storey residential building, which was classified as 'very dangerous', collapsed in Maharashtra's Thane city on Thursday morning after heavy overnight rains, a civic official said. No casualty was reported, Thane civic body's regional disaster management cell chief Santosh Kadam said. The balcony of an apartment on the third floor of 'Gayatri' building located in Kopri area collapsed around 8.30 am, the official said.

The 35-year-old building was classified as 'very dangerous' by the city civic body and was vacated last year and sealed, he said. After a portion of it collapsed on Thursday, local firemen and a team of the disaster management cell rushed to the spot and removed the debris, he said. A team of engineers will take a call on whether to demolish dangerous portions of the building, he added. As many as 79 buildings in the city are under the C1 category (which means very dangerous and need to be vacated immediately), while 123 buildings fall under the C2 category, Thane Municipal Commissioner Vipin Sharma said on Sunday.