"We do understand that Russia has its own interests and policies in the Middle East. Actually, it plays an important role balancing the sides [of the conflict] and it greatly contributes to the fight against the Islamic State. This is why we hope for the preservation of the friendly relations between Russia and the Kurds," Osman said.
He added that the Russia played a vital role in putting an end to the August 16-23 clashes between the Kurdish militia and the Syrian army in the eastern city of Hasakah.
"The hostilities… were stopped only under Russia's mediation. We agreed for the ceasefire only out of respect for Russia," Osman said.
Syrian Kurds announced the creation of the federal region in the country's north at a conference in the Hasakah province on March 17. The initiative was criticized by the Syrian government.
Syria has been mired in civil war since 2011, with government forces fighting numerous opposition factions and extremist groups, including the Islamic State, which is outlawed in Russia, the United States and a number of other states.