The July grain deal aimed to avert a global food crisis by guaranteeing the safe passage of ships in and out of Ukrainian ports, allowing them to export tens of millions of tonnes of grain. The deal also facilitates Russian exports.

"The fact that grain shipments are going to the countries that implement these sanctions (against Moscow) are disturbing Mr. Putin. We also want grain shipments to start from Russia," Erdogan said at a news conference with his Croatian counterpart.

"The grain that comes as part of this grain deal unfortunately goes to rich countries, not to poor countries," Erdogan said.

On Wednesday, Russia's President Putin floated adding limits to Ukrainian grain exports.

U.N. and Russian officials met in Geneva Wednesday to discuss Russian complaints that Western sanctions were impeding its grain and fertilizer exports despite the deal, which was signed by Russia, Ukraine, Turkey and the United Nations.

Ismini Palla, U.N. spokesperson for the Black Sea Grain Initiative, said a drop in global wheat prices in August was partly due to exports resuming from Ukraine, and ensuring food and fertilizer supplies was critical to maintain this trend.

(Reporting by Ezgi Erkoyun; Writing by Daren Butler; Editing by Jonathan Spicer)