ORAKZAI AGENCY - At least four persons were killed and two others sustained injuries when a handgrenade exploded inside at an arms shop at Mamozai area of Orakzai Agency here on Wednesday. Four persons including Khanan Badshah, Syed Rasool, Mohammad Yaqoob and Mir Azam Khan, an arms dealer, died on the spot, when suddenly a handgrenade exploded inside the arms shop owned by Mir Azam Khan. The shop was situated in Sama Bazaar, Mamoza area of Gheljo headquarters. While two other persons who were identified as Luqman and Jafar Khan sustained multiple wounds. Soon after the blast the shop caught fire. Locals recovered the bodies and the injured, who were rushed to a nearby private hospital.