Russian Foreign Ministry spokesperson Maria Zakharova said on Sunday that the Russian forces had hit a Ukrainian military boat in the port of Odesa in Ukraine with high-precision missiles.

"The Kalibr missiles destroyed the military infrastructure of the Odesa port," she posted on Telegram.

The Ukrainian military had mentioned that Russian missiles hit the southern port on Saturday, threatening a deal signed just one day earlier to unblock grain exports from Black Sea ports and ease global food shortages caused by the Russia-Ukraine conflict.