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At a glance: Russian bombardment of Mariupol

(NewsNation) — Ferocious Russian bombardment of the besieged coastal Ukrainian port city of Mariupol has left dozens dead in the past day, according to authorities.

Here is what we know:

For the estimated hundreds of thousands who remain in the city, there is quite simply nowhere to go. The surrounding roads are mined and the port blocked. Food is running out, and the Russians have stopped humanitarian attempts to bring it in. Electricity is mostly gone and water is sparse, with residents melting snow to drink.