Police in Exeter are warning of the dangers of nitrous oxide - or 'laughing gas'.
Lately they've been finding used canisters in local parks - most recently in Heavitree, but also in St Thomas.
When inhaled the gas can cause oxygen starvation to the brain - and the risk is increased if it's taken with alcohol.
Extra roads cash as repair backlog hits £200m
County Council finds a spare £12m
Police crackdown on dangerous drivers
More than 20 vehicles removed
MP's anger as TSB announces Torquay branch closure
Nearest branch will mean a 60-mile round trip
£12 million investment to help repair potholes in Devon
The overall county budget for 2023/24 has come in underspent
Torbay GPs helping with cancer pilot
Liver cancer is hard to spot early
