A cannabis farm worth millions of pounds has been discovered in Thornaby.
Officers forced their way into a building on Teesside Industrial Estate on Tuesday 7 June and discovered a large number of rooms full of plants.
Cleveland Police estimates plants could be worth several millions of pounds.
Seven men were arrested during the police raid - however six of them were released with no further action and have been safeguarded as victims of modern slavery.
Another man, a 51-year-old, was arrested and has been released under investigation while inquiries continue.
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