Ukraine's top grain exporter Kernel Holding said on Monday it had halted operations at Chornomorsk port due to a ‌series of Russian attacks as Moscow intensifies pressure on key Ukrainian trade routes.

Russian missile and ​drone attacks between Friday and Sunday, described by the company as some of the largest wartime strikes, damaged grain, sunflower oil and meal storage and transshipment infrastructure, the company ⁠said.

Kernel, a major Ukrainian grains and oilseed producer, said the timing for restoring operations was ​uncertain.

Russia has repeatedly targeted maritime export routes during the more than four years since its invasion of ⁠Ukraine, striking ports vital to foreign trade and the wartime economy. The Black Sea deep-water port of Chornomorsk has been a frequent target.

Russia's defense ministry said on Monday its forces had hit infrastructure at Chornomorsk port, saying it was being used to handle ‌military cargo for the Ukrainian armed forces.

In a regulatory filing, Kernel said the ​combined missile and drone strikes ‌on the nights of July 10 to 12 were among the most severe on its port assets in recent years.

The company added that ‌the strikes compounded damage from previous attacks in May and June. No casualties were reported.

Ukraine's seaports authority said on Saturday that Moscow hit port infrastructure in the Odesa region for a second day ⁠in a row. It said that two truck ‌drivers were killed in Russian attacks ⁠on one of the ports, which it did not name.

A Russian attack on a Togolese-flagged civilian merchant vessel killed three crew ⁠and injured ⁠five, Ukraine's Deputy Prime Minister Oleksiy Kuleba said on Monday.

The vessel, carrying mineral fertilizers, was moored in the Odesa region at the time of ‌the attack, regional governor Oleh Kiper said. The seaports authority said that port infrastructure was also damaged in Monday's attack.

In recent weeks, Ukraine has intensified its campaign to disrupt Russian logistics ‌in the ​occupied southern Ukraine, including isolating the ‌Crimean peninsula.

Ukrainian drones hit 15 Russian vessels in the Sea of Azov overnight, bringing the total number of vessels struck in the past eight days to 105, Ukraine's drone forces ​commander said on Monday.

Last week, Russia temporarily stopped shipping through a channel linking the Don River with the Sea of Azov, according to industry sources.