In the Ukrainian capital Kyiv, eight people have been reported dead after a shopping centre and a number of houses were shelled.
The mayor of Kyiv has announced a curfew in the city.
The dire situation in Mariupol continues, with some 300,000 people trapped without power, food or water amid intense bombardment and an estimated 90% of buildings have been destroyed.
But Ukraine has ignored Russia’s demand it should give up the city, saying there is “no question of any surrender”.
The BBC’s world affairs editor John Simpson details the events on day 26 of the war.