The Russian President orders troops to seal off the port city.
Victoria speaks to defence expert, Justin Crump, about the situation in the city of Mariupol.
She also talks to a woman who had an emergency C-section in the basement of a hospital as the fighting was intensifying outside.
Anastasia Platonova from the BBC Russian Service – currently based in the Latvian capital, Riga – has been speaking to the mothers of Russian sailors who’ve gone missing.
And the BBC's Lewis Goodall returns to Poland to see how Ukrainian refugees are faring since his last visit.
Today's Ukrainecast was made by Estelle Doyle with Osman Iqbal and Ben Cooper. The technical producer was Emma Crowe. The assistant editor was Sam Bonham.
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