The shelling today hit near a bakery in the town of al-Bab, located east of Aleppo, killing at least 24 people, said Rami Abdurrahman of the British-based Syrian Observatory for Human Rights and Akram al-Halabi, a rebel spokesman based in nearby in Aleppo.
The Observatory obtains its information from a network of activists on the ground. Syrian state media said government forces killed "terrorists," which is how they describe armed rebels fighting against President Bashar Assad's rule.
The army used barrel bombs in both attacks, which contain hundreds of pounds (kilograms) of explosives.
Assad's forces have relied heavily on air power in the last year to regain control of opposition-held territory, particularly in the north and along the border with Turkey. Rebels also control parts of Aleppo, Syria's largest city and its commercial centre.
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Activists say barrel-bomb airstrikes often precede government ground offensives. Assad's troops may be mounting a major operation to recapture territory and bolster its position ahead of peace talks planned for January in Geneva.
Today, the Observatory said government forces fought rebels, including members of the al-Qaida-linked Jabhat al-Nusra, inside the predominantly Christian town of Maaloula near Damascus.
Maaloula lies on the edge of Qalamoun, about 60 kilometres (40 miles) northeast of the capital. The town had been firmly in the government's grip, but is surrounded by rebel-held territory.
It is near Nabek, where there have been clashes for the past three days.
Nabek is located along a key highway connecting Damascus with Homs, Syria's third largest city. Clearing towns and villages of rebels along the highway would help the government regain control of its main overland supply route.
Rebels also fired mortar rounds into the capital and surrounding areas, killing one woman in the suburb of Harasta, the state news agency SANA said.