AMMAN, Jordan — Syria's main exiled opposition group has condemned the reported execution of scores of government soldiers by rebels in a northern Syrian village earlier this week.

The Turkey-based Syrian National Coalition said Sunday that it was forming a commission of inquiry to investigate the incident in Khan al-Assal.

Syrian activists say rebels killed 150 government soldiers, some after they surrendered, on Monday and Tuesday in the village outside Aleppo, the country's largest city.

Syrian state media said that 123 civilians and military personnel were killed in a "massacre" and others were still missing.

The SNC said initial reports showed "armed groups" not affiliated with the main rebel coalition had been involved. The al-Qaida-linked Jabhat al-Nusra says its fighters participated in the battle.