Washington (CNN) An airstrike close to the Iraq-Syria border Sunday was carried out by Israel, and not by the US or the coalition fighting ISIS, a US official tells CNN.

Syrian state TV blamed the strike that targeted pro-regime forces and caused multiple casualties on the US-led coalition combating the terrorist group, but a spokesman for the coalition said there were no coalition strikes in the area near Abu Kamal.

The Israel Defense Forces declined to comment on the strike, per its normal policy.

US officials have said that many pro-regime militias that are also aligned with Iran operate in the border area between Syria and Iraq.

The area is some distance from Israel and Israeli jets would have had to overcome significant logistical hurdles to strike that area.

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