As companies of methanol and xylene chemicals are located near the affected factory, authorities have shifted about 4,800 people from nearby Luvara and Lakhigam villages to safer places
Video footage and images on state media showed a fire and shattered windows in nearby buildings
The explosion appeared to be at the safety valve of an effluent treatment plant, the police said
The blast occurred during a protest by drug-chemist association members outside Punjab Assembly
The blast in the dryer, which is used to dry paper, took place at around 11 AM in Malerkotla, Sangrur
36 wounded in a suspected attack by Kurdish militants on a major shopping and tourist district in central Istanbul