According to a Reuters report, Russia's foreign ministry said on Monday that it saw no prospects for extending the Black Sea grain export deal, which is set to expire in mid-July, Russian news agencies reported.
TASS news agency quoted the ministry as saying that it was continuing consultations with the United Nations and that ship inspections had resumed.
RIA news agency said a new round of Russia-U.N. talks would take place in Geneva on June 9.
The deal was originally brokered by Turkey and the United Nations last July to allow Ukraine to resume exports from its southern ports, which had been blockaded by Russia since the start of its invasion.
To help convince Russia to back the deal, a three-year pact was also struck last July in which the U.N. agreed to help Moscow carry out its food and fertilizer shipments.
Russia has repeatedly threatened to quit the deal, complaining that obstacles still remain to its own exports of food and fertilizer.