Police arrested five men after around 400 people attended an illegal rave in Swinderby near Lincoln over the weekend.
The rave took place between the evening of Saturday, March 21 and early Sunday morning, March 22.
Police were called to the site at the old RAF Swinderby airfield at around 1am on Sunday morning following reports of a noise disturbance in the area.
Five men, all aged in their 20s, were arrested in connection with the incident – two were arrested on suspicion of possession of a class B drug; one was arrested on suspicion of possession with intent to supply a class B drug; another man was arrested after refusing to comply with police.
They have all been released on police bail pending further enquiries. A fifth man was arrested as he was wanted in connection with an unrelated criminal damage and public order offence.
Sleaford Inspector Phil Taylor said: “We are acutely aware of the disruption this caused to the local community and want residents to know we did all that we could to bring this event to a safe and peaceful end as swiftly and effectively as we could.
“We always respond proactively where we have reports of this nature and deal with these types of incidents robustly.
“Where we have any intelligence that an event like this is going to take place we always advise local landowners to target harden as best they can by making sure their respective sites are as safe and secure as possible.
“It is not always possible to make these areas impenetrable and we encourage local people to contact police as soon as they can if they have concerns around any incidents of this nature taking place.
“We will always do our utmost to make sure they are dealt with as quickly and effectively as possible.”