Daesh terrorists have executed at least 24 civilians after seizing a village in northern Syria from a US-backed alliance, a monitor says.
The executions have taken place "in the last 24 hours" in Buyir northwest of Manbij which is mostly populated by Syrian Kurds, the so-called Syrian Observatory for Human Rights said on Friday.
According to the London-based monitor, Daesh seized control of several villages northwest of Manbij on Thursday from the Syrian Democratic Forces, a coalition of Arab and Kurdish militants which are supported by the US.
Buyir lies between the Turkish border and Daesh's self-proclaimed capital of Raqqah city in Syria.
The executions came on the same day in which aircraft belonging to the US-led coalition killed 28 civilians, including seven children, in another village northwest of Manbij.
According to the observatory, the aircraft struck the village of al-Ghandour, 24 kilometers from Manbij, late on Thursday.
Observatory's chief Rami Adurrahman said another 13 people were killed in US-led strikes but it was not clear whether they were Daesh militants or civilians.
The US Central Command said in a statement that its aircraft had conducted airstrikes in the area of Manbij and was looking into whether they had targeted civilians.
The bombings came a week after US airstrikes killed at least 56 civilians in northern Syria.