moscow russia accuse unite state tuesday pretend fight islamic state deliberately reduce air strike iraq allow group militants stream syria slow russian-backed advance syrian army pentagon strongly deny accusations say u.s.-led coalition fight islamic state post data every day number result strike public see late sign rise tensions moscow washington russian defence ministry say statement u.s.-led coalition sharply reduce air strike iraq september syrian force back russian air power start retake deir al-zor province everyone see u.s.-led coalition pretend fight islamic state iraq continue allegedly fight islamic state syria actively reason say major-general igor konashenkov spokesman russia defense ministry result say militants move large number iraqi border areas deir al-zor try dig leave bank river euphrates action pentagon coalition demand explanation change tack desire complicate much syrian army operation back russian air force take back syrian territory east euphrates ask konashenkov artful move drive islamic state terrorists iraq force syria path russian air force pinpoint bomb washington pentagon spokesman colonel robert man describe russian accusations absolutely false remain commit kill isis deny safe havens ability carry strike region globally man say use acronym islamic state konashenkov add syrian troop midst try push islamic state city al-mayadin southeast deir al-zor try daily reinforce rank foreign mercenaries pour iraq russia accuse u.s. pretend fight islamic state syria iraq