Six labourers died while two others were seriously injured in an explosion in a private petro-chemical factory on Wednesday morning. According to the police, one labourer is still missing. The blast took place around 8am when the boiler of the factory was being repaired. “There was a blast in the Mohit Petro-Chemical Factory located on Nagina Road. In the blast, labourers Balgovind, Ravi, Lokendra, Kamalveer, Vikrant and Chetram died. Two labourers were brought to a hospital in a serious condition. One labourer is said to be missing.” said Superintendent of Police Umesh Kumar Singh.