A suspected chlorine gas attack on an opposition-held neighbourhood in the Syrian city of Aleppo caused dozens of cases of suffocation on Tuesday, rescue workers and a monitoring group said.
Turkish President Recep Tayyip Erdogan said Monday he proposed, to the US and Russia, the setting up of a no-fly zone in northern Syria, after Ankara-backed fighters pushed the Islamic State group from the border area.
A string of bombings claimed by the Islamic State group killed dozens across Syria on Monday, as Washington and Moscow failed to agree on a deal to stem the country's violence.
The Syrian army and its allies aim to strike insurgents to the south and west of Aleppo after encircling the rebel-held half of the city, blocking rebels from sending reinforcements from their stronghold in Idlib, a Syrian military source said on Monday.
A string of bomb attacks hit across mostly government-controlled areas of Syria Monday, killing several dozen people including at least 30 in President Bashar al-Assad's coastal stronghold of Tartus, state media said.
Israeli air force hit Syrian government forces after mortar fire from its war-wracked neighbour struck the Israeli-held zone of the Golan Heights on Sunday, the military said.
Syrian government troops renewed the siege of rebel-held parts of Aleppo on Sunday, as Washington and Moscow failed to reach a deal on stemming violence in the country's devastating war.
Turkish forces and Syrian rebels expelled the Islamic State group from the last areas of the Syrian-Turkish border under their control on Sunday, the Syrian Observatory for Human Rights said.
Turkey will never allow the formation of an "artificial state" in northern Syria, Prime Minister Binali Yildirim said on Sunday, referring to the U.S.-backed Kurdish fighters whose advance Ankara is now aiming to stop.
The US said Sunday it had not yet struck a hoped-for deal with Russia on stemming the violence in Syria's brutal civil war, blaming Moscow for backtracking on issues it thought were settled.
US forces hit Islamic State targets overnight near Turkey's border with Syria using a newly deployed mobile rocket system, a senior diplomat said on Saturday.
Turkey and its rebel allies opened up a new line of attack in northern Syria on Saturday as Turkish tanks crossed the frontier from Kilis province, making a western thrust in an operation to sweep militants from its border.