Russia threatened to stop vessels carrying grain from Ukraine, two days after Moscow said it would abandon an agreement that guaranteed the safety of those exports and as ships continued to make the voyages Monday anyway. Russia’s ambassador to the United Nations, Vasily Nebenzya, said Russia’s navy would, if necessary, conduct inspections of ships that did get its permission to depart Ukraine. The Russian Ministry of Defense said any movement of ships along a previously designated grain corridor was unacceptable, citing security concerns.
