I ISLAMABAD: The Security Forces on Thursday killed the wanted terrorist Arif Ullah alias Dadullah during an intelligence-based operation (IBO) conducted in Mir Ali, North Waziristan. The IBO was carried out on the reported presence of terrorists in the Mirali area of North Waziristan, said an Inter-Services Public Relations (ISPR) media release. The wanted terrorist Dadullah got killed during an exchange of fire, it added.