He said earlier that eight people had also been wounded in the attack, one of whom was in critical condition. The Church of Jesus Christ of Latter-day Saints called Sunday's attack a "tragic act of violence." Founded in 1830, the Mormon church considers itself a Christian body but bases its doctrines on the Book of Mormon, a text its followers say contains a fuller version of the words of Jesus Christ than that recorded in the Bible. Based in the western US state of Utah, there are Mormon churches all over the world, with millions of adherents. The head of the Mormon church, Russell Nelson, died on Saturday at age 101 in Utah, the church earlier announced.