ISIS attacked Syrian government-held areas in the eastern city of Deir al-Zor and an air base south of the city on Friday, Reuters said. Regime warplanes bombarded another area of the city and around the air base, the Syrian Observatory for Human Rights said, a day after pro-Damascus...

Russian warplanes have mounted a new wave of air strikes since Thursday night in northwestern and western Syria, a Syrian military source and state TV said on Friday. The source said the 18 air strikes were in the provinces of Idlib, Hama and Aleppo and were against Islamic State...

Hundreds of Iranian troops have arrived in Syria to join a major ground offensive in support of  Bashar al-Assad's government, Lebanese sources said on Thursday, a further sign of the rapid internationalization of a civil war in which every major country in the region has a...

Russia launched air strikes in Syria on Wednesday in its biggest Middle East intervention in decades, plunging the four-year-old civil war into a volatile new phase as President Vladimir Putin moved forcefully to stake out influence in the unstable region. Moscow's assertion...