DHAKA: American jets began bombing ISIS targets in Syria early Tuesday, raising U.S. involvement in the war-torn country and sending a forceful message to the terror group.

The airstrikes focused on the ISIS stronghold of Raqqa, a U.S. official told CNN, though other locations were hit as well.

At least 20 targets in an around Raqqa were hit, the opposition group Syrian Observatory for Human Rights said.

They're the first strikes against the terror group inside the country since President Barack Obama's announcement this month that he was prepared to expand the American efforts beyond targets in Iraq, reports CNN.

All foreign partners participating in the strikes with the United States are Arab countries, a senior U.S. military official told CNN. Those nations are Bahrain, Saudi Arabia, the United Arab Emirates and Jordan.

Diplomatic sources told CNN that Qatar was also involved, though it was not clear whether Qatar actually conducted airstrikes itself.

BDST: 0915 HRS, SEP 24, 2014