The phone conversation between Vladimir Putin and Recep Tayyip Erdogan came after five Turkish troops were martyred and five injured in an attack by Assad regime forces in Idlib, on Monday, following a similar attack last week martyring seven soldiers and a civilian contractor working with the Turkish military.
The two presidents agreed to hold additional consultations via relevant departments, the Kremlin said in a statement, published on its official website.
"The two leaders continued discussions on various aspects of resolving the Syrian crisis, primarily in the context of the worsening situation in the Idlib de-escalation zone.
“The importance of full implementation of the existing Russian-Turkish agreements, including the Sochi memorandum of Sept. 17, 2018, was noted. For this purpose, it was agreed to conduct additional contacts through the relevant departments," read the statement.
The Turkish troops are in Idlib -- nominally a cease-fire zone, under a deal between Turkey and Russia -- as part of an anti-terror and peace mission.
Turkey has since retaliated for both attacks, hitting scores of targets and killing some 200 Assad regime troops.
Idlib has been a stronghold of the opposition and anti-government armed groups since the outbreak of the Syrian civil war in 2011.
In September 2018, Turkey and Russia agreed to turn Idlib into a de-escalation zone in which acts of aggression are expressly prohibited.
But more than 1,800 civilians have been killed in attacks by regime and Russian forces since then, flouting both the 2018 cease-fire and a new one that started on Jan. 12.