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ISIS militants shot dead 40 civilians on Tuesday in the northern Iraqi city of Mosul after accusing them of treason, the United Nations says.

Their bodies were then hung from electricity poles in several districts, the office of the UN Human Rights Commissioner said, citing sources.

The 40 civilians were accused of «treason and collaboration» and dressed in orange clothes marked in red with the words «traitors and agents of the ISF» (Iraqi Security Forces).

The UN says 20 civilians were also shot dead on Wednesday evening at the Ghabat military base in northern Mosul, supposedly for leaking information.