A Syrian regime air raid on the northern town of Al-Bab killed at least seven people Sunday, in a second day of deadly strikes, a monitoring group said.
The Syrian Observatory for Human Rights said regime helicopters dropped explosive-laden barrels on a market area in the Aleppo province town killing seven.
The group, which relies on a network of activists and other monitors on the ground, said the toll could rise because dozens of people were wounded, some seriously.
The attack comes a day after a similar raid on the town, which killed at least 26 people, including seven women and four children, according to the Observatory.
The group said Saturday's attack, which took place near the headquarters of a rebel brigade, also killed three opposition fighters.
The Syrian regime has regularly been accused by the opposition, foreign governments and rights groups of using so-called "barrel bombs" against civilians.
The US State Department has described the weapons as "incendiary bombs which contain flammable material that can be like napalm."
Al-Bab, in northeastern Aleppo, has regularly been targeted by air strikes, including one on a field hospital in September that killed 11 people, according to the Observatory.