India, Nov. 13 -- Three people who died after entering a chemical tank at an automobile-parts manufacturing factory in Bhondsi on Wednesday were working there as welders and painters and had no expertise in handling chemicals and tank-cleaning, police said on Thursday.

Police said Naresh Yadav, 56, who hailed from Badshahpur, and Mohammad Arif, 21, from Bihar's Muzaffarpur, were welders at the factory for the past six years, while Anil Jha, 46, who hailed from Nawada in Bihar, was a painter working there for the past 20 years.

A senior police officer said Naresh was the first to enter the underground tank outside the factory building, where various residual chemicals from the manufacturing process had accumulated.

"He soon fainted insi...