In Punjab, one person has been killed and five injured in a blast in a cracker factory in Gurdaspur district today. The blast was so severe that three-roomed factory has been turned into debris.Deputy Commissioner, Gurdaspur, Dr. Abhinav Trikha has told our jalandhar correspondent that exact cause of the blast is yet to be ascertained. Enquiry has been ordered in this regardMeanwhile, factory owner has been arrested and case has been registered.