Ukraine conflict: UN warns of dangerous deterioration

The UN Security Council has warned of a "dangerous deterioration" in eastern Ukraine and called on warring sides to halt the violence. The council said renewed fighting was having a "severe impact" on civilians. Fighting in the frontline town of Avdiivka has left thousands of residents without water or power in freezing conditions. Ukraine says it is preparing a possible evacuation of the town to avoid a humanitarian crisis. Each side blames the other for the upsurge in violence.
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