Putin's invasion is now targeting the city of Severodonetsk in the Luhansk region. Ukrainian officials say at least two people were killed, and five others were injured in the latest attacks. Meanwhile, Ukrainian President Zelensky visited troops on the front lines in Kharkiv on Sunday. It was his first trip outside the capital region since the invasion began in late February. Our coverage begins with a live report from CNN's Matthew Chance in Kyiv.

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