On Monday, Russian President Vladimir Putin and his Turkish counterpart Recep Tayyip Erdogan held a meeting in Russia's Black Sea resort of Sochi, which lasted almost 4.5 hours. They have agreed to set up a demilitarized zone in Idlib by October 15.
"We are encouraged that Turkey and Russia appear to have taken steps to avert a military offensive by the Assad regime and its allies in Idlib and welcome any sincere effort to reduce the violence in Syria," he said.
The spokesperson also warned Syrian government and its allies against violence in Idlib.
"An offensive by the Assad regime and its allies against the densely populated Idlib province would be a reckless escalation and would have serious consequences for Syria and the surrounding region…. We reiterate something both [US] President [Donald] Trump and President Putin agreed to in Da Nang, Vietnam: There is no military solution to this conflict," he said.
Washington urges all parties to turn away from further military escalation and focus on political solution, he added.