Putin ‘signals’ readiness to lift blockade of Ukrainian ports, exchange POWs, says Austrian chancellor

Russia's war against Ukraine - the main events of May 28

"Our understanding of an active policy of neutrality is to use every opportunity for dialogue," Nehammer tweeted.

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"So I called President Putin. He gave a positive signal about the exchange of prisoners. He also wants to allow the movement of goods across the Black Sea."

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Earlier, Lithuanian President Gitanas Nauseda said that Poland and the Baltic states could provide their ports for Ukrainian grain exports.

China has also called for the creation of a "green corridor" for Ukrainian grain exports.