Russian forces close in on Ukrainian capital Kyiv and bombard port city of Mariupol

The situation is rapidly deteriorating in Ukraine, where Russian forces are closing in on the capital Kyiv and bombarding and surrounding the strategically important port city of Mariupol.

Ground forces have moved to within 15 miles of Kyiv's center, according to Britain's Defense Ministry. Around the city, artillery barrages have sent residents heading for shelter.

In Mariupol, which has faced some of the worst suffering since Russia began its Ukraine invasion, Russian forces shelled a mosque housing more than 80 people, including children, the Ukrainian government said on Saturday. The number of casualties wasn't immediately clear.