They believe that the escalation of tension in the region, where many players will not be helpful to anyone. The United States reserves the right to self-defense of coalition forces fighting the terrorists of ISIS (a group banned in Russia), said Spicer.
The coalition forces of the United States on June 18 has shot down a Syrian su-22. After that, the defense Ministry announced the termination of cooperation with the United States on the Memorandum on the prevention of air incident in Syria.
The Russian side also has accused the U.S.-led coalition that they did not use existing communication channels. The representative of the coalition, however, said that on June 18 they communicated with the Russian, without specifying on what subject.