Russia on May 8 marked Turkey's efforts in Syria's Idlib province with an aim to free the key M4 highway from radical groups.
Speaking at a video conference in Moscow, Foreign Ministry spokeswoman Maria Zakharova said the sustainable stabilization in the area is only possible after separating militants from terrorists.
Turkish and Russian military forces have carried out another joint patrol along a key highway in northwestern Syria, said Turkey's Defense Ministry on April 21.
"Fifth combined Turkish-Russian land patrol was conducted today by air and ground vehicles on M4 motorway in Syria's Idlib province, as part of the earlier TR-RF agreement," the ministry said on Twitter.
Turkey's Defense Ministry said on March 19 that two of its soldiers were killed and another was injured in Syria's northwestern province of Idlib, in a rocket attack by "some radical groups".
In a written statement, the ministry said the radical groups in the de-escalation zone attacked Turkish soldiers, adding that its forces had opened fire on targets in the area.