At least seven children were among 22 civilians killed in air strikes today that hit a school and the surrounding area in Syria's northwestern Idlib province, a monitor said.
The Syrian Observatory for Human Rights said "warplanes - either Russia or Syrian - carried out six strikes" in the village of Hass, including on a school complex.
The raids hit the village around 11:30 am (0830 GMT), an activist with the opposition Idlib Media Centre told AFP.
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Other activists from the province circulated a gruesome photograph on social media of a child's arm, seared off above the elbow, still clutching the strap of a dusty black rucksack.
The authenticity of the picture could not be independently verified.
The Observatory, a Britain-based monitor of Syria's five-year conflict, initially reported two schools had been hit but later clarified that it was a school complex made up of multiple buildings.
Idlib province is controlled by the Army of Conquest, an alliance of rebel groups and jihadists including the Fateh al-Sham Front, which changed its name from Al-Nusra Front after breaking off ties with Al-Qaeda earlier this year.
The province has come under increasing bombardment in recent weeks, according to the Observatory.
Syrian government forces and their Russian ally have been criticised by rights groups for indiscriminate attacks on civilian infrastructure.
More than 300,000 people have been killed since Syria's conflict erupted in March 2011.
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