Zelenskiy introduces martial law in Ukraine as sirens blare in Kyiv

President Volodymyr Zelenskiy said on Thursday that Russia had carried out missile strikes on Ukrainian infrastructure and the country’s border guards, and that explosions had been heard in many cities. Subscribe to Guardian News on YouTube ► He said martial law had been declared across the country and that he had spoken by phone to the US president, Joe Biden. Russia-Ukraine crisis live news: first casualties reported as Putin launches ‘full-scale invasion’ – latest updates ► Russia has invaded Ukraine: what we know so far ► The Guardian publishes independent journalism, made possible by supporters. Contribute to The Guardian today ► Website ► Facebook ► Twitter ► Instagram ► https://instagram/guardian #uk