Dozens of pierced canisters of nitrous oxide have been found in a playground at Claverham, North Somerset.
The chemical, also known as laughing gas, is used in food preparation and as a medical pain killer.
Police believe that youngsters were experimenting with the gas which causes a floating sensation when inhaled.
Officers are trying to find out where they got the 70 canisters from [hmmm, I wonder…] and warned that their misuse could lead to illness or injury.
Pc Phil Kinsella said: “We are very concerned that young teenagers are risking serious injury, as piercing the pressurised canisters could make them explode.
“Alcohol cans and bottles were also found and we don’t know what the combined effects could have for children’s health.
“The Neighbourhood Team will be talking to local schools to encourage them to pass on safety messages to their pupils, but we would also ask parents to talk to their children and make them understand the risks they are running.”
Users also risk frost-bite and its after-effects include nausea, loss of appetite, headache, sleepiness and a lack of co-ordination.
From BBC News Bristol
Well, had to happen sometime. FFS, don’t be dirty bastards, clean up your litter!