You're reading: Reuters: Russia, spurning U.S. censure, launches second day of Syria strikes from Iran

Russia launched a second day of air strikes against Syrian militants from an Iranian air base, rejecting U.S. suggestions its co-operation with Tehran might violate a U.N. resolution as illogical and factually incorrect.State Department spokesman Mark Toner on Tuesday called the Iranian deployment "unfortunate," saying the United States was looking into whether the move violated U.N. Security Council resolution 2231, which prohibits the supply, sale and transfer of combat aircraft to Iran.

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