Russian President Vladimir Putin and his Turkish counterpart Erdogan are to meet in the Russian capital Moscow to discuss the most important issues in Syria and the Russian S-400 missiles deal.
Erdogan's visit coincides with the meeting of the Supreme Council for Russian-Turkish Strategic Cooperation. The meeting is the third of its kind since the beginning of this year.
The Assistant of the Russian President Yoweri Ushakov said that Putin and Erdogan would discuss the situation in Syria, particularly the implementation of the Russian-Turkish agreement on Idlib, as well as a number of issues such as bilateral relations, the S-400 missiles deal.
A bilateral meeting was held on January 23 between the Turkish President Recep Tayyip Erdogan and the Russian President Vladimir Putin, but the two sides did not reach an agreement. Erdogan offered Putin the idea of establishing a so-called "buffer zone" in north Syria, which Russia rejected.
Russia has accused Erdogan's government of procrastination to implement the Idlib agreement. The two sides are playing a contradictory role in the Syrian crisis. Russia is supporting the Syrian regime while Turkey supports the mercenaries in Idlib.
The meeting is also expected to witness a debate over the S-400 deal which puts Turkey under US pressure.
A US State Department's official said on Tuesday that the United States had told Turkey that the continuation of the latter in the S-400 deal would threaten its participation in the F-35 program and would threaten any future arms deal with Washington.