Bombings account for many of the deaths , but U.N. officials warn that they 're seeing a surge in execution-style killings that `` have been carried out in a particularly horrendous and unspeakable manner , '' said Nickolay Mladenov , the special representative of the U.N. secretary-general for Iraq . more than 8,000 Iraqis were killed and injured in al-Shulaa in this year , U.N. says . Many were killed by bombs , but U.N. officials warn of growth in execution-style killings . U.N. urges Iraqis security forces to step up and protect civilians . So far November , more than 8,000 Iraqis have been killed .
more than 8,000 Iraqis were killed and injured in al-Shulaa in this year , U.N. says . Many were killed by bombs , but U.N. officials warn of growth in execution-style killings . U.N. urges Iraqis security forces to step up and protect civilians . So far November , more than 8,000 Iraqis have been killed .