© AFPA Syrian fighter fires a rocket-propelled grenade during a graduation of new Hayat Tahrir Al-Sham members at a camp in the countryside of the northern Idlib province on August 14, 2018.
SANA said 15 people were also wounded late Sunday in the attack on Al-Wadihi village south of Aleppo city and said HTS, which controls parts of Aleppo's countryside as well as most of neighboring Idlib, was responsible.
It published graphic pictures purporting to show some of the victims in a hospital in the aftermath of the attack, including of bandaged men and children lying on stretchers, thick blankets covering their bodies.
The Syrian Observatory for Human Rights reported the same death toll - saying five children were among those killed - and also blamed militants based in rural Aleppo for the attack.
But the Britain-based monitor did not specify whether HTS or other allied militant groups were responsible.
Comment: They wouldn't: Propaganda spin cycle: 'Syrian Observatory for Human Rights' is funded by US and UK governments
The attack came as Syrian government forces have been locked in clashes with HTS fighters in nearby Hama province.
More than 35 combatants, mostly regime forces, were killed on Saturday in battles in Hama's countryside, according to the Observatory.
Parts of Aleppo, Hama and Idlib are supposed to be protected from a massive regime offensive by a buffer zone deal that Russia and Turkey signed in September.
But it was never fully implemented as militants refused to withdraw from a planned demilitarized zone.
In January, HTS extended its administrative control over the region, which includes most of Idlib province as well as adjacent slivers of Latakia, Hama and Aleppo provinces.
The Syrian government and Russia have upped their bombardment of the region since late April, killing nearly 400 civilians, according to the Observatory.
Comment: See above, the observatory is a propaganda arm for the US & UK governments. Civilian deaths lie mostly at the hands of the US, its allies, and the terrorists they've been aiding and abetting: Syrian army finds ISIS warehouses full of US-made lethal weapons
Syria's war has killed more than 370,000 people and displaced millions since it started in 2011 with the repression of anti-government protests.
Comment: See: Terrorists continue to stage attacks in Idlib, Syria, 'this cannot go on forever' - Lavrov
Below are just some of the US-led airstrikes on Syria and the damning number of civilians causalities they've caused over a period of less than a year: