Warplanes launched some of the heaviest air strikes yet on rebel-held areas of Aleppo on Friday after the Russian-backed Syrian army declared an offensive to fully capture Syria's biggest city.
A ‘minister’ in Syria's opposition government was among at least 12 people killed in a car bomb attack in the south of the country on Thursday, the body's spokesman said.
Huge blazes erupted in Syria's Aleppo as the city was rocked by fighting and air strikes on Thursday, ahead of last-ditch efforts by world powers to salvage a failed ceasefire.
The UN Security Council met on Wednesday for crisis talks on Syria as air raids shook Aleppo and diplomatic tensions ran high over an attack on an aid convoy.
A Syrian warplane crashed north of Damascus on Wednesday, but it was unclear if it had been shot down or came down because of a technical fault, the Syrian Observatory for Human Rights monitoring group said.
An air raid carried out overnight by Syrian or Russian warplanes killed four medical workers and at least nine rebel fighters near Aleppo, the Syrian Observatory for Human Rights monitoring group said on Wednesday.
US President Barack Obama insisted diplomacy is the only way to end the brutal five-year conflict in Syria on Tuesday, as a ceasefire brokered by Washington and Moscow lay in tatters.
Aid convoys for four Syrian towns will be postponed as staff reassess security after a deadly attack on relief trucks and intensified violence, a senior official from the International Committee of the Red Cross (ICRC) said on Tuesday.
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, supported by Russian air forces, repelled an offensive by militants on the northern fringes of Syria's largest city of Aleppo on Tuesday, killing 40 attackers, RIA news agency quoted Russia's Defence Ministry as saying.
A truce brokered by the United States and Russia has "practically failed and has ended" and there is no hope that aid will be delivered to rebel-held eastern Aleppo, a Syrian rebel official said on Monday.
Turkish air planes hit Islamic State targets in northern Syria, the Turkish military said in a statement on Monday.