Police arrested five people and seized sound equipment at an illegal rave after they were alerted by someone who saw it advertised on Facebook.
Officers were called at about 19:30 British Summer Time on Saturday and later discovered the event, attended by about 600 people, at Massingham Heath, Grimston, Norfolk.
According to BBC News, they monitored it through the night and disrupted it at about 15:45 on Sunday.
Three men, aged 25, 28 and 31, were arrested in connection with organizing the event.
Two other men, aged 20 and 33, were arrested on suspicion of drug-driving.
All remain in police custody, where they will be questioned.
Temporary Assistant Chief Constable, Nick Davison described the operation as “significant” and said the event was closed down safely.
He said, officers had been working closely with landowners and would continue to do so. – BBC News