A Level 4 fire broke out in a flat on the 42nd floor of a high-rise building at Dadar in Central Mumbai on Thursday night, a fire brigade official said.
No casualties were reported, he said. The fire was extinguished at around 3.50 am.
Blaze erupted in closed flat
The blaze erupted in the closed flat around 8.30 pm on the 42nd floor of the 44-storey residential tower, said the official. It was earlier declared as Level 2 fire which was upgraded to Level 4 later.
The cause of the level-4 fire (Massive category), which was confined to an electric panel on the 42nd floor of the structure, was not immediately known, he said.
Firefighting system not functioning
The firefighting system of the building was not functioning, said the official, adding Fire Brigade and police personnel were at the spot.
An operation to douse the flames was on with the help of 16 fire engines, a fire tender, 4 jumbo tankers and a 90-metre high crane, among other equipment, he said.
The Chief Fire Officer of the Brihanmumbai Municipal Corporation (BMC), two Additional Chief Fire Officers and other senior officials were supervising the operation.
Four ambulances were also at the site, the official added.

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