Canning (WB): One person was killed and three others suffered severe burns on Sunday after a blast in a small temporary firecracker unit at Pathar Pratima in South 24-Parganas district.
The police said they were making firecrackers for a local public Durga Puja organisers for a display later in the evening at Kayal Bazar in Sridhar Nagar.
One of them died on the way to hospital, sources said.
The gunpowder and other chemicals caught fire and the unit blasted this afternoon, the police said.
The three critically injured people were admitted to hospital.