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.
Dramatic bedroom window rescue of flood-hit resident
Andy Matthews and his dog were evacuated from East Devon home
Storm damage to West Hoe Pier could cost extra £200,000
West Hoe Pier was hit "at most vulnerable" stage
Storm Chandra causes disruption across Devon
School closures and travel chaos across county
Devon demands government cash for storm repairs
Calls for more flood defence
Two arrested after body found in Plymouth waters
Teenagers questioned on suspicion of murder
Theatre raises over £50K for youth programmes
Festive appeal total doubles
