Coalition airstrike in in northern Syria in 2014. Illustrative photo: Wikipedia.

Turkey-backed Syrian rebels seized a number of villages and towns from Kurdish-led forces in northern Syria on Sunday amid Turkish airstrikes and shelling that killed at least 35 people, mostly civilians, according to rebels and a monitoring group.

Turkey sent tanks across the border to help Syrian rebels drive the Islamic State group out of the frontier town of Jarablus last week in a dramatic escalation of its involvement in the Syrian civil war.

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