residents are also fleeing the city of sievierodonetsk in the eastern donbas region. the town has been heavily shelled. as of earlier today, the regional governor said ten high-rise buildings were on fire. sky news john sparks is in sievierodonetsk, where police are searching damaged buildings for many residents to try to get them out. >> nobody knows how many people are left in severe or gun next, but officer anton knows where to look. there are sick people living in this overcrowded cellar, but they refused to evacuate it. some are scared, others did not trust the police. but there are others, like this 84-year-old woman, who have made a decision to flee. she was carried to the vehicle at speed in the arms of an officer. it is wonderful, she says. how are you, madam? it's scary, isn't it, it is very frightening? there is a building on the front line where half a dozen people live underground, we see them emerge in the darkness, covered in soot and dirt. the people that live in this shelter rarely leave it because it is the most dangerous part of the city. they do th

, which may bear the brunt. >> sky news is jon sparks in sievierodonetsk, one of the eastern cities bracing for a likely russian assault. there is the devastated city of mariupol. after weeks of constant bombardment, much of the city appears uninhabitable. yet there are an estimated 160,000 people still trapped there under russian siege, with no water, no heat and no electricity. the mayor of mariupol said that over 5000 civilians had been killed there. we may eventually learn of more even worse. today, the mariupol city council said the russians are using will bile crematoriums to cover up the evidence of civilian killings. joining us now from western ukraine is a member of the mariupol city council, maxim, thank you for taking time to be with us tonight. mariupol mayor has said today that more than five dozen civilians had been killed over the last several weeks, including more than 200 children. a lot of ukrainians who saw the images out of bucha this week told us that they worry that is what is happening in mariupol is going to be far worse, we just can't see yet. what do you know about