"We will never withdraw from the zone," says Hayat Tahrir al Sham, the largest militant group in northwestern Idlib, two days after regime announced a truce between it and opposition forces.
UN humanitarian chief Mark Lowcock tells Security Council to take action to end the "carnage" in Syria's Idlib province, saying the Council members have "done nothing for 90 days as the carnage continues in front of your eyes."
Britain-based Syrian Observatory for Human Rights says seven children are among those killed in air raids in Idlib and Hama provinces. Separately, a suicide bomber killed six regime soldiers in southern Daraa province.
Another 45 civilians were wounded in the strikes across the opposition-held Idlib region, according to the Syrian Observatory for Human Rights.
Opposition factions seized Hamameyat village and a hilltop in Hama province amid deadly clashes, war monitor SOHR says.
Following attacks, Ankara has retaliated with a measured response and warned the regime of severe 'punishment' if its forces are targeted again in future.
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.
White Helmets sources say the dead include three children. More than 470 civilians have perished in regime and Russian bombardment in Idlib de-escalation zone despite a deal against acts of aggression in northwestern opposition bastion.
Turkish Defence Ministry says the Syrian regime attacked an observation point which was established after an agreement between Turkey and Russia to protect civilians from attacks in Syria.
Russian news agencies quoted military sources on Wednesday as saying Ankara and Kremlin agreed on a ceasefire in the de-escalation zone of the governorate of Idlib in north-western Syria.
The Kremlin also rebuffed criticism from US President Donald Trump of Russian and Syrian military action in Idlib, saying it was needed to shut down rebel attacks being launched from there.
Implementation of a 2012 roadmap to UN-supervised elections in Syria has been discussed by US and Russian diplomats, says Ambassador James Jeffrey amid ongoing attacks in north-west Syria.
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