Alternative shipping routes are currently being worked out in cooperation with the relevant authorities and the business community, the Russian Agriculture Ministry said in a statement on Tuesday, while stressing that exports will continue.
Shipping is an important export route for agricultural products such as grain from occupied territories in Ukraine - products that Kyiv claims are stolen.
Ukraine has escalated its attacks on ships at sea and, according to a Ukrainian commander, Russian ships are being hit every two hours.
The drone attacks in the Sea of Azov are part of a broader offensive around Crimea.
