In Mahathir's early years as prime minister, Malaysia was experiencing a resurgence of Islam among Malays. Malays were becoming more religious and more conservative. PAS, which had in the 1970s joined UMNO in government, responded to the resurgence by taking an increasingly strident Islamist stand under the leadership of the man who in 1969 had defeated Mahathir for his parliamentary seat Yusof Rawa. Mahathir tried to appeal to religious voters by establishing Islamic institutions such as the International Islamic University of Malaysia which could promote Islamic education under the government's oversight. He also attracted Anwar Ibrahim, the leader of the Malaysian Islamic Youth Movement (ABIM), to join UMNO. In some cases, Mahathir's government employed repression against more extreme exponents of Islamism. Ibrahim Libya, a popular Islamist leader, was killed in a police shoot-out in 1985; Al-Arqam, a religious sect, was banned, and its leader, Ashaari Mohammad, arrested under the Internal Security Act. Mahathir comprehensively defeated PAS at the polls in 1986, winning 83 seats of the 84 seats it contested, leaving PAS with just one MP.