Jihadists have killed 270 Syrian regime fighters, civilian security guards and staff since seizing a gas field in Homs, a monitoring group said.
The United Nations will vote on a draft resolution which will allow the delivery of humanitarian aid to Syrians without government consent.
Syria’s governement says a presidential election will take place on June 3, but Western leaders say the vote is a "parody of democracy".
The international mediator for Syria has apologised for a lack of progress at "laborious" talks in Geneva.
Mediator Lakhdar Brahimi will meet representatives of the warring sides in Syria separately for the first few days to increase pressure on them.
Nine people are dead and 100 wounded in bomb blasts near Syrian security service buildings as a bombing battle intensifies against government targets.
Syria has challenged the UN chief over the scope of a UN truce monitoring mission, resisting a larger presence as its army shelled targets in Homs.
At least 18 people have been killed on Monday as Syrian forces pressed their crackdown on dissent, pounding rebel bastions in the restive north.
For ordinary Syrians cornered by the regime’s brutal crackdown, an escape across the border into Turkey is their only chance of survival.
Syrian forces sent shells crashing into a rebel Homs neighbourhood for a seventh straight day, hours after Russia warned Damascus to avoid civil war.
The bodies of 47 women and children have been found in the Syria’s Homs, where security forces have been fighting raging battles against armed rebels.
Human Rights Watch claim new satellite imagery and eyewitness accounts reveal that the bombardment of Homs in Syria has caused 700 deaths.
American war correspondent Marie Colvin was killed while trying to retrieve her shoes so she could flee an army bombardment in Homs, Syria.
Syrian troops have shelled rebel-held neighbourhoods in Homs, a day after the UN General Assembly condemned human rights violations by the regime.
Syrian government forces have attacked President Bashar al-Assad opponents on several fronts, sending residents fleeing from a town near the capital.
Syrian forces have bombarded districts of Homs and struck other cities after Arab states pledged support for the opposition battling Bashar al-Assad.
Explosions have rocked Aleppo in Syria as tanks entered Homs, ahead of planned protests to denounce Russia’s steadfast backing of the regime.
Armoured reinforcements poured into Homs as President Bashar al-Assad’s army attacked the city for a fourth day, worsening the humanitarian situation.
Syrian troops have pressed a relentless assault on the flashpoint Syrian city of Homs for a fifth straight day, killing dozens more civilians.
A Sudanese general has flown to Damascus to head an Arab League mission to check Syria’s compliance with a peace plan to halt a crackdown on unrest.
