Kolkata: Early on Sunday, Congratulations Sardar (51), a housewife, succumbed to her injuries following an explosion at a firecracker factory at Haral in Champahati under Baruipur police district in South 24-Parganas district a day before. The factory owner, Pintu Mondaland another woman, Bhakti Sardar, were injured. Preliminary reports suggest a cooking gas cylinder had exploded at Pintu’s house, where the crackers were stored. SDPO Baruipur, Atish Biswas, said probe was on. tnn