Chemical weapons experts have determined that mustard gas was used during fighting in Syria in August, according to a report by an international watchdog seen by Reuters. The chemical - which causes severe delayed burns to the eyes, skin and lungs and is banned under international law...

The Syrian state and allied militia have detained and abducted tens of thousands of people since 2011 in a campaign of enforced disappearances that is a crime against humanity, Amnesty International said in a report on Thursday. The rights watchdog interviewed relatives of the...

Moscow's military force in Syria has grown to about 4,000 personnel, but this and more than a month of Russian air strikes have not led to pro-government forces making significant territorial gains, U.S. security officials and independent experts said. Moscow, which has maintained a...

Syrian government officials and members of the country's splintered opposition could meet in Moscow next week as Russia pushes to broker a political solution to the crisis, a senior official said on Tuesday. "Next week, we will invite opposition representatives to a consultation...