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STORY: Russia attacked Ukraine's main inland port on the Danube River on Wednesday (August 2).

The strikes pushed up global food prices as Moscow ramped up its use of force to prevent Ukrainian grain exports.

Video released by Ukraine’s southern Operational Command showed ruined port buildings in Izmail, in the Odesa region.

The attacks forced ships to halt and drop anchor as they prepared to dock and load up with Ukrainian grain in defiance of a de-facto blockade Russia reimposed in mid-July.

Izmail, across the Danube River from Romania, has since served as the main route for Ukraine's grain exports.

Photographs released by the Ukrainian prosecutor's office showed at least two wrecked silos.

Reuters wasn't able to verify their location or date.

There were no immediate reports of casualties.

Russia has relentlessly attacked Ukrainian agricultural and port infrastructure since reintroducing the blockade.

Kyiv says its aim is to persuade shippers and their insurance companies that Ukrainian ports are unsafe to resume exports.

Two industry sources told Reuters operations at the port were suspended.

The United Nations has warned Russia's decision to abandon the grain deal, brokered by the U.N. and Turkey, could cause a food crisis and hunger in the world's poorest countries.