Live: Street-to-street fighting in eastern Ukrainian city, Zelensky vows to retake territory

Ukrainian forces struggled to hold their ground in bloody street-to-street fighting in the eastern frontline city of Sievierodonetsk as President Volodymyr Zelenskiy said the situation was difficult, also pledging to retake Russia's gains. Follow our liveblog for the latest developments. All times are Paris time (GMT+2).