Rochdale police have uncovered a cannabis farm worth around £350,000.
A warrant took place at a business on Reed Hill at around 7.22am yesterday.
In total, 510 cannabis plants were discovered at the scene, along with 7kg of dried herbal cannabis, valued at a street-value of £70,000.
A 30-year-old man was arrested on suspicion of being concerned in the cultivation of cannabis and abstracting electricity without authority.
A Rochdale Town Centre neighbourhood spokesman said: “This was a sophisticated cannabis farm that would be capable of producing four or five harvest per year. This would represent a street value of between £1 million and £1.75 million per annum, should police not have discovered the farm.
“We have got an offender in custody in relation to this offence and the plants have been seized with enquiries ongoing.
“We treat any information or intelligence provided by the public with utmost seriousness. It is crucial to our investigations, and we will take action on it when necessary.
“Please let us know if you have any concerns about drug activity in your local area – anybody who has any information or concerns regarding ongoing crime within their community should contact GMP on 101 or via the reporting tools on www.gmp.police.uk, or by calling Crimestoppers in confidence on 0800 555 111.”