A Kurdish militia that has been backed by U.S.-led air strikes in Syria has joined a new military alliance that includes Arab groups, a statement released overnight said.
A new video released by Islamic State shows militants executing three Assyrian Christians and demanding a $14 million ransom for the release of over 200 other Syrians held hostage by the group.
Islamic State militants have blown up the Arch of Triumph, a major monument in the 2,000-year-old Roman city of Palmyra, Syria's antiquities chief said on Sunday, after they destroyed two ancient temples at the central Syrian site in recent months.
The military campaign by Russia, Syria and its allies is vital to save the Middle East from destruction, Syrian President Bashar al-Assad said, a day after Moscow said it would step up air strikes against Islamic State targets across Syria.