"Very complicated," the source said when asked about the situation surrounding the negotiation process.
Ankara and the UN are well aware that the mechanism can be stopped due to the fact that the conditions of the deal are not fully met, the source added.
"We are continuing the negotiations, the process has not stopped. We call on our Western partners to assist the export of Russian agricultural products and fertilizers, we are focused on results in this regard," the source said.
On Monday, UN Secretary-General Antonio Guterres said he was concerned about the possible termination of the grain deal.
In mid-May, the grain deal was extended until July 17 without any changes. The Russian Foreign Ministry warned that Moscow would block the extension of the deal if its concerns about the implementation of clauses on Russian agricultural exports were not addressed.
The grain deal was brokered by the United Nations and Turkiye in July 2022 to facilitate the export of agricultural products from Ukrainian ports in the Black Sea during hostilities. The package agreement also included a memorandum of understanding between Russia and the United Nations to unblock Russian grain and fertilizer exports via the Black Sea.