India, March 11 -- A day after four labourers suffocated to death while cleaning a water tank in an under-construction building in south Mumbai, the J J Marg police arrested two contractors on charges of negligence.

The incident took place around 12:30 pm on Sunday at the Bismillah Space building on Dimtimkar Road in the Nagpada area. Five workers entered the water tank to clean it but lost consciousness inside. Four of them-Hasibul Shaikh, 19, Raja Shaikh, 20, Imandar Shaikh, 38, and Ziyaullah Shaikh, 36-were later declared dead. All were residents of West Bengal. A fifth worker, Butan Shaikh, 32, was rushed to J J Hospital with severe weakness, breathlessness, and tremors. His condition is currently stable, police confirmed.

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