The United States and its allies have staged 22 air strikes on Islamic State targets since Friday, including four near Ramadi, the city taken by the militants this week, the U.S. military said on Saturday.

Coalition forces also attacked five Islamic State sites in Syria between Friday and Saturday, a statement from the Combined Joint Task Force said.

The strikes near Ramadi hit tactical units, armored vehicles and a fighting position in militant-controlled territory. Ramadi fell to Islamic State on Sunday in a serious setback for Iraqi forces that also cast doubt on the U.S. strategy of using mainly air strikes against the militants.

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