The main problem between Turkey and Russia, according to analysts who spoke to Xinhua, is Moscow's dissatisfaction with Ankara's performance in Idlib and its concern that Ankara may again start cooperating with Washington on Syria.

Under a deal inked with Moscow in September, Ankara was supposed to persuade all the rebel groups to withdraw into the inner parts of Idlib for the creation of a demilitarized zone with the Syrian army.

However, some of the Islamic extremist groups have refused to exit and launched attacks instead on Syrian army positions in recent weeks, drawing Russian anger.

The main reason behind Moscow's reaction is Turkish failure to do its part in full in Idlib, stated Dilek, a former staff officer in the Turkish military.

Russia apparently thinks Turkey cannot talk over the Islamic extremist groups, said Hasan Koni, an analyst on international relations at Istanbul Kultur University.

Russian President Vladimir Putin recently told his Turkish counterpart Recep Tayyip Erdogan that there were still issues to be settled in Idlib.

The pair met on the sidelines of a G20 summit in Argentina in early Dec. and agreed to continue cooperation on Idlib, while Putin also described Ankara as a reliable ally for Moscow.

However, both Dilek and Koni feel that Moscow may be questioning Ankara's reliability as a partner in Syria.

GROWING RUSSIAN CONCERN

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