Eight people were killed in an explosion at a fireworks factory near Sivakasi in Tamil Nadu.Twelve others suffered burns, the police said, adding the factory was a licenced unit.The police said they are investigating what led to the explosion,More details are awaited.Sivakasi is known as the fireworks manufacturing hub of India. The place also occupies a huge share in the country’s total production of firecrackers, safety matches, and stationery items.