Islamic State (IS) group militants killed one of the most prominent tribal leaders cooperating with the Egyptian army in the country’s Sinai Peninsula on Monday morning, local sources said. Hamid Al-Wat, a leader of the Al-Tarabin Bedouin tribe, was killed by members of IS affiliate Wilayat Sinai in North Sinai Governorate, tribal sources told The New Arab’s Arabic sister site, Al-Araby Al-Jadeed. The sources said Al-Wat was one of the most noteworthy sheikhs of the Al-Tarabin Bedouin and had fought alongside the Egyptian army and intelligence services in Sinai for many years. IS militants wer…