The UN did not confirm Kyiv's claims about the alleged theft of grain by Russia

This was stated during a press conference by the official representative of the UN Secretary General Stéphane Dujarric. 

“We are in contact with the office of the World Food Program, they do not confirm these accusations,” RIA Novosti quotes him.

Earlier, Russian President Vladimir Putin said: statements that Russia does not allow the export of Ukrainian grain are a bluff.

Ukraine must clear the approaches to the ports, and the Russian Federation, for its part, guarantees the peaceful passage of ships with grain, he explained.