Around 40 workers were rushed to hospitals with burn injuries following a blast in the boiler of a spare parts manufacturing facility in the industrial area of Dharuhera on Saturday, said police.
No casualty was reported yet, a senior officer said.
Many of the wounded were rushed to the Civil Hospital in Rewari and some were referred to hospitals in Delhi and Gurugram, said police.
The incident took place around 5.50 pm when a boiler burst in the dust collector of the factory, said police.
Several fire tenders were rushed to the unit to put out the fire.