Turkey, Russia Foreign Ministers Set for First Meet since Plane Downed

US Secretary of State John Kerry was also in the Serbian capital for the annual ministerial council of the Organization for Security and Cooperation in Europe (OSCE), which he was due to address early Thursday.

The council was expected to focus on the crisis in Ukraine, along with migration, terrorism and other shared challenges, "as well as ways to rebuild consensus on European security as a common project", an OSCE statement reported by AFP on Thursday said.

Kerry was scheduled to meet Russian Foreign Minister Sergei Lavrov Thursday, but it was not clear when Lavrov would talk to his Turkey counterpart Mevlut Cavusoglu during the two-day gathering in Belgrade.

The meeting would mark the two countries' first high-level face-to-face talks since the downing of the Russian plane on Nov. 24 along Turkey's border with Syria, which has badly strained relations between Ankara and Moscow.

On Wednesday the Russian minister said he was willing to meet Cavusoglu, who was "insisting" on holding talks on the sidelines of the council.

"We will not be evading this contact", Lavrov said. "We will hear what Mr. Cavusoglu has to say. Perhaps there will be something new after what has already been said publicly."

After arriving in Belgrade, the Russian told reporters that it would be "sad not to hear anything new" from the Turkish side.

Russia Wednesday accused Turkish President Recep Tayyip Erdogan and his family of involvement in illegal oil trading with Daesh (ISIL) extremists, ratcheting up the heat in the bilateral dispute.

The Turkish strongman accused Moscow of "slander" and has rejected Russian President Vladimir Putin's demands to apologize over the plane incident, saying that Turkey was acting well within its rights to protect its border.

The ministerial council, the governing body of the OSCE, brings together 40 foreign ministers and other high-level diplomats in Belgrade before Serbia passes the chairmanship to Germany for 2016.