Mark Austin presents Sky News Breakfast live from Kyiv on Thursday February 24.

- Russian troops begin movements across borders into Ukraine;
- Ukraine's President tells citizens to stay at home;
- as the EU describes the "darkest hour since the end of World War II'.

Go to our live blog for the latest on this story:
https://news.sky.com/story/explosions-reported-near-kyiv-after-putin-authorises-military-operation-in-ukraine-ukraine-latest-12541713

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