Four youths from Sleaford have been taken to hospital under the influence of drink and drugs on the recreation ground.
Police were made aware of the situation over the weekend on Boston Road in Sleaford.
Numerous young people were heavily intoxicated with drugs and alcohol through the evening, with four ending up in hospital. It is unclear how old they are.
Sleaford Police is increasing patrols in the area, saying it will use appropriate powers to stop this happening again.
Officers are also asking parents to ensure they know where their child is, what they are up to and who they are with.
If you have any more information about the events over the weekend, contact Sleaford Police either via the Facebook page or by calling 101.