Fox News reports:  A detachment of U.S Marines arrived in Syria outside the ISIS de-facto capital of Raqqa, a U.S. defense official confirmed Wednesday to Fox News. The Pentagon is not publically confirming the move, citing operational security.

The recent deployment is expected to be discussed Thursday when the head of U.S. Central Command, Gen. Joe Votel, the top U.S. general responsible for American forces in the Middle East, appears before Congress to testify on the ISIS fight.

Votel had hinted that more troops would be headed to Syria along with artillary when he spoke to reporters while traveling in the region late last month.

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