Syrian air strikes and shelling killed 25 civilians in eastern districts of Aleppo on Thursday, a monitor said, on the third day of a wide-ranging regime assault on rebel-held areas.
Russian President Vladimir Putin on Tuesday cancelled a visit to France in a furious row over Moscow's role in the Syrian conflict.
Syrian regime forces advanced in Aleppo on Sunday after Russia unleashed dozens of air strikes in the battleground northern city overnight, a monitor and an AFP correspondent reported.
Eleven children were killed on Thursday in a barrel bomb attack carried out by government forces on a rebel-held neighbourhood of Syria's Aleppo city, a monitor said.
Syrian President Bashar al-Assad on Thursday offered an amnesty to armed rebels battling his forces if they surrender, the official SANA news agency reported.
More than 50 State Department diplomats have signed an internal memo sharply critical of US policy in Syria, calling for military strikes against President Bashar al-Assad's government.
President Bashar al-Assad vowed on Tuesday to fight on in what he called Syria's war against terrorism, showing no sign of compromise in his first major address since peace talks broke down in April.
Syrian government forces and their allies fought insurgents near Aleppo and jets carried out raids around a nearby town seized by Islamist rebels, despite international efforts to reduce the violence.
Displaced families returned home and schools reopened in rebel-held districts of Syria's Aleppo on Saturday after a truce was extended for 72 hours in the battleground northern city.
US Secretary of State John Kerry warned Syrian leader Bashar al-Assad yesterday of “repercussions”...
UN-brokered talks aimed at ending Syria's brutal conflict will push ahead until April 27, despite the departure of the main opposition group, a negotiator in the talks said on Friday.
Suspected government air strikes on Tuesday killed at least 44 civilians at two markets in a part of northwestern Syria controlled by the war-torn country's Al-Qaeda affiliate, a monitor said.