Police seized hundreds of cannabis plants during a series of coordinated drug raids.
Officers carried out intelligence-led warrants at three properties in St Michael’s Street, Sutton-in-Ashfield, and another in nearby Cooperative Street.
Hundreds of cannabis plants were seized and will now be destroyed after the raids at around 8am yesterday (Thursday) morning.
Expensive remedial work will also be required to fix dangerously bypassed electrics at two of the properties.
Three men, aged 72, 43 and 34, were arrested on suspicion of being concerned in the supply of drugs and were later released on police bail.
Inspector Jon Hewitt, district commander for Ashfield, said: “These intelligence-led warrants would not have been possible without information received from our community and should send out a very clear message.
“The cultivation of cannabis on this kind of industrial scale is something we take extremely seriously and we will continue to do everything we can to disrupt the people responsible.
“Cannabis cultivation is big business and is very often linked to serious organised crime groups from home and abroad – truly unpleasant people who won’t think twice about using extreme violence to grow and protect their business.
“Related offences such as human trafficking and modern slavery are also common traits of this cruel and exploitative criminal enterprise.
“Residents in neighbouring properties are also placed at considerable risk of fire from the sheer amount of combustible materials and chemicals stored in these grows, and the highly dangerous modifications made to the electrics.
“Put simply, this is an activity that should never be ignored or excused. So if you have reason to suspect a property in your street please contact the police and tell us about it. We will listen, we will investigate and we will look to take this kind of firm action.”