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Frantic search for four missing miners in Poland after cave-in
Rescue workers are using bare hands in a desperate attempt to save four missing miners at a Polish copper mine that was hit by a tremor and a cave-in.
Four other miners were killed in the tragedy, the mine's director said.
The tremor occurred shortly after 9pm local time on Tuesday some 1,100 metres underground in the Rudna mine in the south west town of Polkowice.
The German Research Centre for Geosciences reported a magnitude-4.5 shallow earthquake in the region at the time of the cave-in.
The mine's director, Pawel Markowski, confirmed the death of a fourth miner, a 24-year-old, and said four other miners remain missing.
Five other miners have been taken to hospital, but their lives are not in danger and a few others escaped unscathed.