this is bbc news. welcome if you're watching in the uk or around the globe. i'm james reynolds live in lviv. our top stories. the beseiged ukraine town of mariupol is again denied a humanitarian corridor, after rejecting a russian demand to surrender. 300,000 people are trapped without power, food or water. president zelensky says it's a war crime. translation: over three weeks of this war, already _ 115 children have died. that's the most horrible war in europe since the second world war. a 35—hour curfew for the people of the ukraine capital kyiv. residents are told by the mayor it's a �*dangerous moment�* and they must stay at home. it follows a direct russian strike on a shopping centre in the kyiv.