An official of the Inter-Services Intelligence (ISI) was martyred and seven other members sustained injuries in gun battle with terrorists in South Waziristan district of Khyber-Pakhtunkhwa, sources reported quoting Inter-Services Public Relations (ISPR). According to a statement issued by military’s media wing, the incident occurred in Angoor Adda locality of South Waziristan district, wherein ISI official, Brigadier Mustafa Kamal Barki, encountered the terrorists.