Puri: Diwali celebrations turned tragic in Puri on Sunday evening after cracker fire spread to a house in Baliapanda and led to a gas cylinder explosion leaving seven people injured. One of the injured, who sustained critical burns, was shifted to Cuttack.The incident took place at the residence of Dilip Baliarsingh (55) located behind Madan Villa guest house in Baliapanda. Police sources said a motorcycle parked on the premises had been leaking petrol. It subsequently caught fire from crackers, and the flames spread to the house, triggering an explosion in a gas cylinder kept inside.Among the injured are Sanjeev Sarkar (35), Lokanath Biswas (45) and Anukul Biswas (17). Sanjeev sustained over 30% burn injuries. All the injured were initially taken to Puri district headquarters hospital.On being alerted, police and fire services personnel rushed to the spot and managed to bring the fire under control. Police personnel also took necessary steps at the site to prevent further accidents. Baliapanda police have initiated an investigation to ascertain the exact circumstances leading to the incident.