Demonstrators gather in Iraqi cities after Friday prayers . Authorities impose curfews to limit access to city centers . `` We live in a country rich with oil , yet we do n't have jobs , '' demonstrators said . The U.S. military says it is investigating the reports of civilian deaths and injuries from a helicopter crash that killed four service members on Saturday.
Demonstrators gather in Iraqi cities after Friday prayers . Authorities impose curfews to limit access to city centers . The U.S. military says it is investigating the reports of civilian deaths and injuries from a helicopter crash that killed four service members on Saturday.