The Pentagon at a video conference with Russia voiced "strong concerns" over Moscow's bombing of US-backed forces in southern Syria, a spokesman said on Saturday.
US military officials "expressed strong concerns about the attack on the coalition-supported counter-ISIL forces at the At-Tanf garrison, which included forces that are participants in the cessation of hostilities in Syria," said Pentagon spokesman Peter Cook after the talks.
He added that the Pentagon "emphasized that those concerns would be addressed through ongoing diplomatic discussions on the cessation of hostilities."
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