Five members of a family were killed in a blast due to an LPG cylinder leak at a house in Vidhyadhar Nagar area in Jaipur, Rajasthan, early today, a police official said. <br/><br/>Additional DCP Rajesh Meel said, the fire broke out on the ground floor and spread to the first floor. <br/><br/>Three members of the family sleeping on the ground floor were charred to death, while two on the first floor died due to suffocation. The fire has been extinguished, he added.