2013 Nanga Parbat massacre militants were also responsible for the February 2012 Kohistan Shia Massacre, in which 18 Shi'ite Muslims were killed. Navid further said that intelligence agencies played a pivotal role in the arrests and that further information would be released in a couple of days. The Chief Secretary of Gilgit-Baltistan, Younis Dagha, announced that among the arrested on August 19, 2013, was the terrorist Qaribullah ("Hasan"), a former Tehreek-e-Taliban Pakistan leader of the Chilas unit, who might be the mastermind of the Nanga Parbat attack, as well as M Nabi (Qari Husnain), who was a suspect in the murder of government officials
Amir Mehdi Amir Mehdi Amir Mehdi (sometimes spelled Amir Mahdi, and also known as Hunza Mehdi) was a Pakistani mountaineer and porter known for being part of the team which managed the first successful ascent of Nanga Parbat in 1953, and of K2 in 1954 with an Italian expedition. He, along with the Italian mountaineer Walter Bonatti, are also known for having survived a night at the highest open bivouac - - on K2 in 1954. In July 1953 a German-Austrian team went for expedition to Nanga Parbat. The expedition was organized by the half-brother of Willy Merkl, Karl Herrligkoffer from Munich,