"Obviously, I would tell you we are paying very, very close attention, but there are no immediate equities for CentCom or the Department of Defense," Votel told the Tampa Bay Times on Friday. "That's still very much being worked out. We have not been told to do anything with respect to that."
On June 7, Russian Foreign Minister Sergey Lavrov announced that experts from Russia, the United States and Jordan agreed on a memorandum to establish a de-escalation zone in Syria's southwest, which started on Sunday. Russia, Iran and Turkey signed a memorandum establishing four safe zones in Syria that went into force in May.
Syria has been devastated by civil war for more than six years now, with government forces fighting opposition factions, including terrorist groups such as the Islamic State and the Nusra Front, both of which are outlawed in Russia.