Dera Bassi, May 23 -- A 40-year-old contractual labourer was killed after alleged gas exposure at a chemical plant on Mubarakpur Road in Derabassi.

The victim was identified as Sunil Yadav, who had been working in the plant for the last 14 months. His family has accused the contractor and factory management of negligence.

According to his family, he was exposed to toxic gas while on night duty on May 17, which led to irritation in his eyes and a steady deterioration in his health.

Speaking at the Derabassi government hospital, where Yadav's body was kept for post-mortem, his wife and daughter alleged that instead of being taken to a government or specialised hospital, he was given basic medication at small private facilities.

"When he...