Shelling by Syrian rebels killed several children at a school in government-held western Aleppo on Thursday, state media and a monitoring group said, just a day after air strikes on a school in a rebel-held village in Idlib, 50km away.
The governor of Homs said late on Monday the planned evacuation of several hundred Syrian rebels from their last foothold in the city would be postponed for several days because it was difficult to guarantee their safe passage.
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.
Opposition-controlled parts of Syria's battered northern city Aleppo came under total siege on Sunday, after government forces severed the last route out of the east.
A group of Syrian rebel fighters late Friday seized control of a crossing on the Iraqi border, the Syrian Observatory for Human Rights said.