A five-year-old boy was found dead at the house of his neighbour in West Bengal's Birbhum district on Tuesday, following which a mob ransacked the house and set it on fire, police said.
Four people have been arrested by the CBI from Mumbai in connection with the violence that claimed eight lives in West Bengal's Birbhum earlier this year.
West Bengal CM has alleged that Birbhum massacre is a conspiracy to scuttle the Deocha Pachami project that is aimed at providing employment to 0.1 million people.