If the Black Sea is closed, the Danube is one of the main routes which we will need to use," he told Reuters by phone. Police said Danube grain warehouses had been hit on Monday in a drone attack along with tanks for storing other cargo. Since Monday's air strikes, the Danube channel has seen shipping disruptions, although it was unclear why there was a slowdown of vessel traffic. INSURANCE RATES RISEInsurance sources have said war risk cover for Ukraine's ports that was part of the defunct Black Sea grain deal had been suspended with some insurance providers reviewing provisions for Danube ports. The attack on the Danube infrastructure followed a week of Russian strikes that hit grain-related infrastructure at Odesa's main ports.

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