A teenager is in hospital with burns to back after agreeing to be set alight with aerosols and flammable liquids at a party in Sydney's north.
Police say the 18-year-old was with friends in Collaroy Plateau just after midnight when the incident took place.
They say he sustained "superficial but excessive burns to his back" and was taken by ambulance to Royal North Shore Hospital in a stable condition.
Officers attended the party venue and arrested another 18-year-old who is assisting with their inquiries.
- AAP
