The scenes from the city provide a window into the carnage being wrought by the Syrian military's increasing reliance on airstrikes to fight rebels waging a civil war to topple Assad. Rights groups say the airstrikes often hit civilian areas. And this week, U.S.-based Human Rights Watch accused Syria of using cluster bombs, which pose grave dangers to civilians.
The regime contends that it is fighting terrorists backed by foreign powers who seek to destroy Syria and denies using cluster bombs.
The latest onslaught from the skies left residents frantically poring through mounds of rubble searching for survivors or bodies trapped underneath.
Amateur videos purportedly filmed after an airstrike there on Thursday showed the men carrying around body parts and 18 white cloth bundles holding the remains of those killed. Activist claims and videos cannot be independently verified due to restrictions on reporting in Syria. But all videos corresponded to activists' reports and appeared to have been filmed where they said they were.
One strike hit a neighborhood near the rebel field hospital in Maaret al-Numan, activist Fadi Yassin said via Skype.
Airstrikes also hit three nearby villages on Wednesday, killing 15 people, Yassin said. Nine of those were in Kafar Nubul, while others died in the villages of Kafrouma and Hass.
Airstrikes late Wednesday and early Thursday hit at least five towns in northern Idlib and Aleppo provinces, both of which border Turkey.
The aftermath of one of the strikes was captured on video late Wednesday in the city of Aleppo. It struck a large mosque. While some men in the videos carry away bodies, others work to dig out a survivor whose legs are buried in debris.