"With regard to Syria, what we do with the Russian Federation is we deconflict our operations, we do not coordinate with them," Mattis said. "We deconflict with them in time and in space. We will not be doing anything additional until the secretary of state and the president have further figured that out at what point we are going to start working alongside our allies with Russia in the future."
Mattis made the remark when asked whether he had prepared options for cooperating with Russia in Syria following the Helsinki summit between President Vladimir Putin and President Donald Trump.
Following the Hektalks, US Central Command commander Gen. Joseph Votel said that US forces in Syria have received no further special instructions and that any further cooperation with the Russian military in Syria would require action by the US Congress.
Trump also said in an interview after the summit that the positions of the United States and Russia on Syria are quite similar, and the two countries' approaches are getting closer.
Meanwhile, Russian Ambassador to the United States Anatoly Antonov also said deconfliction in Syria is not enough. Antonov said the Russian military wants to establish "normal, mutually respectful relations," but added that the US military is legally forbidden from cooperating with Russia.
Russia, together with Turkey and Iran, is a guarantor of the Syrian ceasefire and has been assisting Damascus by offering support to combat the terrorists as well as by providing humanitarian aid.