BEIJING, Oct 24 (Reuters) - A tunnel in a north China coal mine caved in, killing 12 miners and causing five houses above the shaft to collapse, state media reported on Wednesday.

Workers were repairing and extending the 85-metre tunnel under a residential area in Shanxi province on Monday when the cave-in occurred, Xinhua said.

The cause of the accident was being investigated. There was no mention of any casualties from the collapse of the homes.

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