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A resident inside Crimea has told the BBC the situation there is "catastrophic", as Ukrainian drones strike oil refineries and power plants on the peninsula, as well as military targets.

The strikes on Russian-annexed Crimea have increased significantly in recent weeks - partly to cut off supply lines to Russian troops attacking Ukraine from the south.

Eastern Europe correspondent Sarah Rainsford explains why Kyiv is striking now and why the peninsula matters to Vladimir Putin personally.

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