The Latest: Activists: at least 20 killed in Syria airstrike

The Latest on the conflict in Syria (all times local):

11 a.m.

Syrian activists say at least 20 civilians have been killed in an airstrike on an Islamic State-held village in Deir el-Zour province in eastern Syria.

The Britain-based Syrian Observatory for Human Rights monitoring group reported Wednesday that several unknown warplanes bombed the village of Hajna the night before, killing 12 people from one family and 10 from another. It said at least 10 children were killed.

The activist group Deir Ezzor 24 said no one in the two families survived.

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10:15 a.m.

Turkey's state-run news agency says Turkey and Russia have reached an agreement on a plan for a cease-fire comprising the whole of Syria.

The Anadolu Agency, quoting unnamed sources on Wednesday, said the two countries were working to ensure that the cease-fire would come into effect after midnight.

It said however that terror organizations would be kept outside of the cease-fire agreement, without elaborating on which insurgent groups would be considered terror organizations. It said a peace process in Kazakhstan's capital of Astana would go ahead under Russia and Turkey's leadership if the cease-fire holds. Anadolu said the two countries would act as "guarantors" of the peace process.

There was no immediate confirmation from Turkey's Foreign Ministry.