Two years after seven people, including three children, died in Sitapur in February 2020 after allegedly inhaling poisonous gas leaking from a chemical factory, a field epidemiological investigation has confirmed the cause of deaths due to inhaling fumes from a chemical named Lindane that is generally used as agricultural insecticide. According to the epidemiological investigation jointly conducted by ICMR-National Institute of Epidemiology, Chennai, department of health and family welfare, UP and CSIR-IITR, Lucknow the cause of death was due to asphyxia following the leakage of toxic fumes from Lindane that was stored in the chemical factory.
From Hindustan Times: https://www.hindustantimes.com/cities/lucknow-news/2020-sitapur-gas-leak-deaths-due-to-inhaling-toxic-fumes-from-insecticide-lindane-says-report-101655828566108.html