The United States has expanded its fight against the Islamic State of Iraq and the Levant beyond the borders of Iraq and into Syria, launching strikes with fighter jets, bombers and Tomahawk missiles, the Pentagon confirmed Monday night.

The U.S. and partner nations “are undertaking military action” against the Islamic militant group in Syria, Pentagon press secretary Rear Adm. John Kirby said in a statement. “The decision to conduct these strikes was made earlier today by the U.S. Central Command commander under authorization granted him by the commander in chief.”

The U.S. Central Command, in a statement early Tuesday morning, said Jordan, Saudi Arabia, the United Arab Emirates, Qatar and Bahrain participated in the new airstrikes. The United States was the only Western nation involved, a U.S. official said earlier.

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