Ukraine is holding difficult negotiations on extension of the agreement that allows the export of grain from its Black Sea ports after the current agreement expires next month, Mykhailo Podoliak, an adviser to the head of the Office of the President of Ukraine, said in an interview with Bloomberg.

The CFTS portal reported this, citing the Ukrinform state news agency.

"We are hoping for an extension of the mandate to export grain from Ukrainian ports," he said.

However, he declined to specify when the negotiations can be expected to yield results, describing the negotiations as "difficult."

According to him, Ukraine is not negotiating with Russia directly. Instead, the negotiations are taking place in subgroups, which also include Turkey and the United Nations.