The Syrian Observatory for Human Rights, a London-based war monitor, said that four children were among 15 civilians killed in air strikes by the Syrian regime and its ally Russia.
A pilot who ejected from the plane was captured, says Syrian Observatory for Human Rights after militants shoot down a regime warplane in Idlib province.
Opposition factions seized Hamameyat village and a hilltop in Hama province amid deadly clashes, war monitor SOHR says.
War monitor said that Syrian regime forces and insurgents fought fierce battles that left dozens dead in the country's northwest, as the regime tried to regain control of two villages they lost earlier this month.
Britain-based Syrian Observatory for Human Rights says the civlians, including two children, were killed on the outskirts of Maaret al Numan town and in the villages of Kansafra and Khan al Subul.
Clashes ensued when Russian-backed regime forces tried to retake two villages seized by militants and allied rebels earlier this month.
At least 44 regime loyalists, 39 rebel and militant fighters have been killed since Thursday on the edge of rebel-controlled Idlib, Syrian Observatory for Human Rights says.
The civilians, including a dozen people at a busy market, were killed in the rebel and opposition-held Idlib since Tuesday midnight, the Syrian Observatory for Human Rights says.
Britain-based Syrian Observatory for Human Rights reported that 30 people were also wounded in the assaults by Al-Qaeda's former Syria branch, Hayat Tahrir al Sham, and its ally Hurras al Deen.
The deceased include four children while many others were wounded in the explosions in the main city of Idlib.
Presidents of three countries will meet to continue discussions on how to resolve the conflict in Syria as Daesh makes a last stand in the east of the country and Washington prepares to withdraw troops.
Turkey on Thursday deported Johanna Cornelia Boersma for her suspected links to Jabhat al Nusra, a terrorist group with historic links to Al Qaeda, a senior official of the Turkish presidency said.
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