The U.S. military said on Friday, January 15 eight civilians were likely killed and three wounded in air strikes against Islamic State targets in Iraq and Syria between April 12 and July 4 last year, Reuters reports.

It was only the third time since the start of the U.S.-led air campaign against Islamic State in 2014 that the U.S. military's Central Commander has disclosed civilian casualties following its internal investigations.

It has previously reported a total of six civilian deaths in its air campaign.

U.S. military data shows there have been 9,627 U.S.-led coalition air strikes as of Jan. 13, with 6,393 in Iraq and 3,234 in Syria.

"We continue to review additional claims of civilian casualties and will provide additional information in the future," Central Command said in a statement.

The latest eight civilian deaths occurred during five separate air strikes, including one on July 4 near al Raqqa, Islamic State's de facto capital in Syria.

The U.S. military said it was targeting a "high-value individual" when a car and a motorcycle entered the target area after the weapon was released. Three unidentified civilians were likely killed, it said.