A Syrian military helicopter has crashed in flames under rebel fire in Damascus, and a government warplane fired rockets at targets on the capital's outskirts for what rebels said was the first time.
Syrian army mortar and artillery bombardment of an area of southern Damascus where Palestinian refugees live have killed at least 20 people, residents and local emergency workers say.
Syrian army bulldozers have razed houses in western Damascus, pursuing what activists called the first campaign of collective punishment targeting people's property in areas of the capital hostile to President Bashar al-Assad.
Syrian rebels said they planted bombs inside the Syrian army's General Staff headquarters in central Damascus as President Bashar al-Assad's forces bulldozed buildings to the ground in parts of the capital that have backed the uprising.
France and Britain have warned Syria's President Bashar al-Assad that military action to secure safe zones for civilians inside the country is being considered despite the paralysis of the UN Security Council over how to end the 17-month conflict.
Syrian President Bashar al-Assad said in a television interview his government had been aware some officials were trying to defect and allowed them to leave unhindered.
The United Nations' four-month-old observer mission in Syria will withdraw from the country next week, diplomats and UN officials say, yet another blow to the world body's efforts to broker an end to the conflict.
Syria's rebels are jubilant, claiming to have shot down a jet and captured its pilot, an apparent victory against the overwhelmingly superior firepower of President Bashar al-Assad's forces.
Foreign ministers at a meeting of the Organisation of Islamic Cooperation have agreed to suspend Syria from the international body, an OIC source said, further isolating President Bashar al-Assad.
Syrian civilians desperate to check on their homes have pushed into fluid front lines around the devastated Salaheddine district of Aleppo, even as sniper fire cracked out and rebels warned them to stay away.
President Bashar al-Assad has named a new prime minister to replace Syria's most senior government defector as his forces pushed rebels back from a strategic district in Aleppo.
Former French president Nicolas Sarkozy has called for rapid international intervention in Syria, likening its conflict to the early days of war in Libya in which he mobilised NATO-led action that helped rebels oust Muammar Gaddafi.
The UN General Assembly has overwhelmingly voted to condemn the Syrian government and demanded a political transition in Syria, which has seen 17 months of fighting between forces loyal to President Bashar al-Assad and opposition fighters.
Syrian artillery, planes and a helicopter gunship have pounded rebel positions in Aleppo, witnesses say, as President Bashar al-Assad's forces tried to break through the insurgents' frontline in Syria's largest city.
A suicide bombing that killed three of Syrian President Bashar al-Assad's top military officials will speed the end of the uprising against him, the head of the opposition Syrian National Council said.
Syrian rebels battled deep into the heart of Damascus against government troops, who unleashed artillery and helicopter gunships on their own capital in retaliation for the assassination of Bashar al-Assad's closest security officials.
As a pillar of Syria's repressive system, Syrian Prime Minister Riyad Hijab was well placed to understand that the ruling elite he represented for the last quarter of a century may not survive the popular uprising against Assad family rule.
The Syrian military stepped up its campaign to drive rebel fighters out of Aleppo, but rebels said they were still holding firm in the country's biggest city, which they have vowed to turn into the "grave of the regime".
The United States says it appears that forces loyal to Syrian President Bashar al-Assad are "lining up" for a massacre in the city of Aleppo, but again ruled out military intervention in the conflict.
UN Secretary-General Ban Ki-moon has called on world powers to urgently unite to end the bloodshed in Syria, recalling the inertia of the United Nations in 1995 as genocide occurred in the Bosnian town of Srebrenica.