Presidents Tayyip Erdogan of Turkey and Vladimir Putin of Russia discussed grain supplies and a potential regional gas hub in Turkey in a phone call on Sunday, both countries said.
Relations with NATO member Turkey are vital to Russia at a time when the West has hit it with waves of economic sanctions, which Ankara has refrained from joining.
Turkey has, however, rejected Russia's move to annex four Ukrainian regions as a "grave violation" of international law. Ankara has acted as a mediator with the United Nations on an agreement that guarantees grain exports from both Ukraine and Russia, two of the world's biggest producers.
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