Many Islamists were very angry about the peace treaty. They made plans to take over the Egyptian government and kill all the main leaders, so that they could bring Egypt back to having an Islamic government instead of a secular one. In February 1981, the Egyptian government heard of this plan. In September that year, Sadat ordered over 1500 people arrested because he thought they might be part of the plot. These people included Islamists, but also the Bishop and other clergy, and many of Egypt's top intellectuals and activists. This arrest was very unpopular. However, Sadat missed a group of Islamists in the military who were led by Lieutenant Khalid Islambouli. This group assassinated Sadat on 6 October during the victory parade celebrating the crossing into the Sinai Peninsula. Eleven other people were killed in the attack, and 28 were wounded. At the same time, Islamists also took control of the city of Asyut for a few days.