Three labourers were killed following leakage of gas in a pickle factory in Umarpur village here, police said today.
The incident took place at about 11 PM yesterday.
Those killed have been identified as Ajit Mishra (45), his son Ajesh (18) and Subhash Chandra (30).
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One labourer was stated to be critical and has been admitted to a hospital.
An FIR has been registered in this regard against factory owner Sunil Agarwal and manager Yogendra Tripathi.
