Fierce fighting on Mariupol's streets, and Russia denies its cosmonauts wore Ukrainian colours in space.
Street fighting is taking place in the city of Mariupol, which is surrounded by Russian troops
The humanitarian situation in the city is critical. It has no electricity, gas or water, and supplies of food and medicine are running out. Russian President Vladimir Putin boasts that Russia leads the world in hypersonic missiles, which can travel at more than five times the speed of sound. They can also change direction mid-flight, making them harder to track.
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