Russian Bombers Use Iranian Base to Attack Syrian Militants

  • Strikes hit areas held by Islamic State and moderate forces
  • U.S. probing if strikes violate Security Council resolution

Su-34 aircraft.

Photographer: Valery SharifulinTASS via Getty Images

Russia acknowledged that its warplanes used an air base in Iran to bomb militants in Syria, drawing U.S. complaints that the move “was not helpful” in efforts to enact a cease-fire in the country’s 5 1/2-year civil war.

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