this is bbc news. welcome if you're watching here in the uk or around the globe. our top stories... officials in the besieged city of mariupol say russian forces are continuing to bomb residential areas. a humanitarian convoy heading there has been forced to turn back. it comes as three people, including a child, were killed after a russian air strike on a maternity hospital in the city. ukraine's president condemns the bombing in the strongest terms. translation: we have not done and would never do anything - like this war crime in any of the cities of the donetsk or luhansk regions, or any region, because we are people. russian tanks come under attack on the outskirts of kyiv.