WASHINGTON -- Ten Iraqi soldiers have been killed in what may have been the first friendly fire incident of the war against ISIS, U.S. military officials said Friday.

In a brief statement, U.S. Central Command said that one of several airstrikes it conducted Friday against ISIS targets may have resulted in the death of Iraqi soldiers. It did not specify how many were involved, but sources told CBS News Pentagon correspondent David Martin ten soldiers were killed.

Central Command said it had acted on requests and information provided by Iraqi security forces on the ground near Fallujah, which is in ISIS control. It said the airstrikes were done in coordination with Iraqi forces.

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The U.S. will investigate what happened and has invited the Iraqis to participate, saying "We are fully committed to the safety of our Iraqi partners while pursuing the destruction of our mutual enemies."