At least four labourers suffocated to death while cleaning a water tank at an under-construction building in the Nagpada area of Mumbai on Sunday.
The officials had put the death toll at five earlier.
The incident occurred at Bismillah Space building located on Dimtimkar Road in the Nagpada area at around 12.30 pm, PTI reported.
Five workers entered a water tank to clean it but passed out inside while doing the job, said a fire official.
The civic officials said that as soon as the incident was reported, they rushed to the spot and rescued the workers.
The workers were rushed to JJ Hospital by the Mumbai Fire Brigade (MFB) for treatment where four of the five workers were declared brought dead by the doctors.
A civic official identified the deceased as Hasipal Shaikh (19), Raja Shaikh (20), Jiaulla Shaikh (36) and Imandu Shaikh (38), while the fifth person, Purhan Shaikh (31) is recuperating.
An accidental death report (ADR) was registered and a probe has begun to find out lapses, if any, on the part of those who hired the five and whether safety protocols were adhered to, a JJ police station official said.
Fire Brigade, BMC and police personnel are at the site as part of the probe, he said.
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