MULTAN: Nine persons sustained burn injuries when a cylinder exploded at a shop in Cantt.According to Rescue 1122, nine persons including Iqbal, Shafique, Salman, Ihsan, Altaf, Ishfaq, Naeem, Rashid and others sustained injuries when a cylinder exploded at a shop in Cantt area.Rescue 1122 shifted four injured to Nishtar hospital.The police was investigating the incident.