this is bbc news. i'm yalda hakim. welcome if you're watching in the uk or around the globe. powerful explosions again rocked the capital of ukraine. russian air strikes hit residential apartment blocks in kyiv and a metro station. the mayor says four people were killed. from and a metro station. the mayor says four people were killed.— four people were killed. from 8pm, the curfew is _ four people were killed. from 8pm, the curfew is established _ four people were killed. from 8pm, the curfew is established in - four people were killed. from 8pm, the curfew is established in kyiv. i the curfew is established in kyiv. movement through the city is prohibited. without special passes. nearly 3 million refugees have fled ukraine. we report from poland where a shopping centre is being used to house families. hooliganism, how the kremlin describes the anti—war