The Yazidi community was affected by several acts of violence in 2007. In April, a group of Yazidi men stoned to death 17-year-old Du’a Khalil Aswad, allegedly for her involvement with a Muslim boy. On April 23, 2007 masked gunmen abducted and shot 23 Yazidis near Mosul; this was speculated to be a reprisal attack for Aswad's death. On August 14, 2007 Yazidis were targeted in a series of bombings that became the deadliest suicide attack since the Iraq War began.

http://en.wikipedia.org/wiki/Yazidi