U.S. believes sarin used in attack near Idlib - U.S. source

WASHINGTON (Reuters) - The U.S. government believes the chemical agent sarin was used in an attack in the northwestern province of Idlib on Tuesday that was "almost certainly" carried out by forces loyal to Syrian President Bashar al-Assad, a U.S. government source said.

(Reporting By Mark Hosenball; Writing by Arshad Mohammed; Editing by Chris Reese)