ENOCH, Utah (AP) — City leaders in a small Utah town choked up this week as they expressed shock after a murder-suicide carried out by a fellow church member left eight people dead in their close-knit community, including five children who were classmates with their kids.

Though shocking, family mass killings are an all-too-common tragedy across the country. They've happened nearly every 3.5 weeks for the last two decades on average, according to compiled by USA Today, The Associated Press and Northeastern University.

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