The Latest on the war in Syria and international efforts to resolve the crisis around the embattled city of Aleppo (all times local):

1:20 p.m.

The U.N. envoy for Syria is offering a "suggestion" to Russia over its proposal to set up humanitarian corridors around the northern Syrian city of Aleppo, advising Moscow leave the job to the United Nations.

Staffan de Mistura spoke to reporters in Geneva on Friday, a day after Russia said its forces and those of the Syrian government would open humanitarian corridors outside Aleppo and offer a way-out for fighters wanting to surrender.

De Mistura says he is awaiting clarification from Russian authorities about that plan. He noted an urgent situation in the northern city, wracked by devastating violence in recent months.

The envoy also warned that "the clock is ticking for the Aleppo population."

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11:55 a.m.

Syrian activists say U.S.-led coalition airstrikes targeting a village in northern Syria held by the Islamic State group killed 28 civilians, including seven children.

The Britain-based Syrian Observatory for Human Rights says coalition aircraft struck the village of Al-Ghandour on Thursday night.

Observatory's chief Rami Adurrahman says another 13 people were killed in the strikes but that he couldn't say if they were IS fighters or civilians.

It was also unclear if the Al-Ghandour strikes involved an airstrike reported on Thursday by the U.S. Central Command, which is responsible for U.S. forces in the Middle East.

CENTCOM said the coalition had conducted airstrikes in the area of the town of Manbij in the past 24 hours and was looking into reports that there were civilian casualties.

Al-Ghandour is near Manbij.