Syrian aircraft and artillery pounded rebel-held areas of Aleppo early Friday as Damascus and its ally Moscow intensified a renewed offensive against the rebels.
Syrian and Russian warplanes bombed rebel-held areas in Aleppo and Idlib province overnight, a monitor said, a day after Moscow announced a fresh offensive against opponents of its Damascus ally.
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.
Fierce fighting and clashes between regime forces and rebels rocked the eastern edge of Syria's capital on Friday, an AFP correspondent and military source said, despite a fragile truce across the country.
Syria's government on Tuesday warned that all aid going to the divided city of Aleppo, particularly assistance sent by Turkey, must be coordinated with Damascus and the United Nations.
A string of bomb attacks hit across mostly government-controlled areas of Syria Monday, killing several dozen people including at least 30 in President Bashar al-Assad's coastal stronghold of Tartus, state media said.
A Syrian warplane crashed northeast of Damascus on Friday and a rebel group accused the al Qaeda-linked Nusra Front of killing its pilot after his capture.
The United Nations will not hold another round of Syria peace talks in Geneva until officials on all sides agree the parameters for a political transition deal, which has an August 1 deadline, UN envoy Staffan de Mistura said.
Two Syrian rebel groups which have been fighting each other near Damascus have negotiated a ceasefire in Qatar, statements published by the two groups said.
At least 50 fighters and two civilians were killed Tuesday in clashes between rival anti-regime groups east of Syria's capital, the Syrian Observatory for Human Rights said.
Lebanon's Hezbollah on Saturday blamed Islamist extremists for killing the Shia militant group's top military commander in Syria in an artillery attack.
Lebanese militant group Hezbollah announced on Friday that its top military commander had been killed in an attack in Syria in a major blow to the coalition supporting the Damascus regime.
