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One of the biggest concerns is that the Kremlin may launch another Oreshnik hypersonic ballistic missile like the one its forces fired at a factory in Dnipro last November.

Emergency services were deployed across Ukraine, including in the Zaporizhzhia, Donetsk, Zhytomyr, Kherson and Dnipro regions.

Four people have been killed and another 19 injured in a mass Russian drone attack on the central Ukrainian city of Dnipro, the regional head has said.

We watch another two dozen injured Ukrainian soldiers being loaded on to a bus to be taken to a hospital in Dnipro – some walking wounded, others carried on stretchers.

"I have no plans for the future at all," says Oleksandr Bezhan, standing next to an empty, frozen paddock where he used to work as a fisherman on the bank of the Dnipro river in southern Ukraine.