Three workers died due to asphyxiation after they entered a factory's boiler-tank in Ramanagar district to clean it, police said today.
One worker, who tried to rescue them, was somehow brought out, they said, adding, due to timely medical aid he is out of danger.
The incident had occurred last night.
Among the deceased was a worker from Tamil Nadu, police said.
A case of culpable homicide not amounting to murder has been registered against the factory management.
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