More than £100,000 worth of cannabis was discovered when police were called to an abandoned pub by a member of the public.
Officers were called to the old building, in Forest Street, Sutton-in-Ashfield, shortly after 9.30pm on Monday night when two men were reported to be carrying knives outside.
Local officers, armed response vehicles and a police dog unit went to the scene and were soon alerted by a police drone to a large heat source coming from an area of the property.
After gaining entry officers discovered more than 200 cannabis mature cannabis plants inside. Left undiscovered the plants would have had an estimated street value of more than £100,000.
They have now been destroyed and an array of sophisticated growing equipment has also been put beyond use. Nobody has been arrested and enquiries are ongoing.
PC Liam Craggs said: “This was a significant cannabis grow that is likely to be linked to organised criminality. It would have taken a great deal of time and money to set up and I am pleased that it has now been taken out of action.
“The large-scale production of illegal drugs has a significant negative impact on our communities that often brings with it violence and other related offending. We are determined to clamp down on the people responsible for this trade and on this occasion have a member of the public to thank for alerting us. So if you see any suspicious activity then please report it to the police immediately.”