In Andhra Pradesh, at least 15 people were killed and 20 others injured when gelatin sticks stocked in a house blew up due to a fire triggered by a cylinder blast in a village in Guntur district today.<br/>The explosion occurred at Narayanapuram village in Dachepally block when a cooking gas cylinder exploded. Soon the gelatin sticks stocked inside the house caught fire. Police said, the explosion was so powerful that nearly 15 neighbouring houses were razed.<br/>So far, eight bodies have been recovered and more persons are feared trapped in the debris. Relief operations are on and the injured are being admitted to the Guntur General hospital.<br/><br/>Andhra Pradesh Chief Minister K Rosaiah has directed top officials to conduct a thorough investigation into the blast . <br/>State Director General of Police R R Girish Kumar said that a detailed enquiry has been ordered into the blast.