The incident took place at building no 73, Meghdoot Building on S G Barve Marg in Nehru Nagar area around 4.45 pm
The water tank having storage capacity of 50,000 litres caved as excavation was going on for the plinth of the under-construction building next door, they said
No one was injured in the incident, the official said, adding that personnel of the fire brigade, police and civic staff rushed to the spot after getting information
Also, around 15 families have been evacuated from adjoining building number 75, as a precautionary measure
Nehru Nagar colony, developed by MHADA after the 1960s, currently has several buildings under construction
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