About 1,400 suspected cannabis plants with a street value of £250,000 have been seized in a police raid on a farm building in South Gloucestershire.
Police raided the farm building at Nibley, near Yate, on Thursday
Officers found the plants and growing equipment at the address close to Nibley, near Yate, after a tip-off.
An Avon and Somerset Police spokesman said the quantity seized would have a "significant impact" on the drugs market locally and further afield.
A man, 28, was arrested and bailed to allow forensic analysis on the plants.