LAHORE  -  Punjab Chief Minister Maryam Nawaz Sharif has expressed a deep grief over the tragic loss of a young couple and their children in a cylinder explosion in Burewala. Extending heartfelt condolences to the bereaved family, she directed the authorities to enforce a strict ban on defective cylinders across the province to prevent such incidents. The chief minister also sought a detailed report on the incident from the Commissioner Multan.