It conveyed "uneasiness" to the Russian ambassador Tuesday, calling the strikes a "violation of the borders of the Idlib de-escalation zone" established by Turkey, Iran and Russia, according sources at the foreign ministry.
Lavrov noted that Moscow and Tehran have reached an important stage in preparation for implementing the initiative launched by Russia, Iran and Turkey to organize the Sochi Congress.
The Turkish foreign minister noted that Damascus could not have made big military advances without the active support of Russian Federation and Iran.
It has repeatedly condemned Washington's support for the YPG. The Russian newspaper Krasnaya Zvezda, an official body of the Russian Ministry of Defence, reported that the drones had taken off from the Muazarra region of Idlib that is controlled by Turkey and where Syrian opposition forces are based. "They have a different intention".
"Russia and Iran must stop the Syrian regime".
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A previous attempt in November to convene talks in Sochi failed due to disagreements between the prospective participants.
Turkish President Tayyip Erdogan speaks during a meeting at the Presidential Palace in Ankara, Turkey, January 10, 2018.
The Syrian regime's attacks on "moderate opposition" could cause throwback to Russian initiated national dialogue meeting in Sochi, because the talks aim peace negotiations also with those rebel groups, said the official. The Russian embassy in Ankara did not issue any comments.
Turkey's Foreign Minister Mevlut Cavusoglu said that relations with the United States were harmed by Washington's refusal to extradite cleric Fetullah Gulen and its provision of arms to the Kurdish militant YPG.
Hayat Tahrir al-Sham group, spearheaded by the former al-Qaeda affiliate in Syria that was known as the al-Nusra Front, is mainly dominating in Idlib.