A 15-year-old girl died after being found unconscious at a Devon park due to an adverse reaction from a "legal high", police believe.
The teenager was taken to hospital from Bakers Park, Newton Abbot, around 4.50am but later died in the early hours of Saturday.
Devon and Cornwall Police said they believe she "had taken a new psychoactive substance, more commonly referred to as 'legal highs', and had suffered adverse reaction".
Police believe the drug was illegal. The phrase "legal high" is still commonly used to refer to substances which may have been legal before the Psychoactive Substances Act 2016 became law last year.
Two other teenage girls were also taken to Torbay District Hospital as a precaution and have since been discharged.
Officers want to speak to anyone with information about the incident, as well as anyone who was in the park in the early hours of Saturday.
The teenager's family have been informed of her death while police are still at Bakers Park as they conduct initial enquiries.
The Government this month unveiled a new strategy to target psychoactive substances, which were formerly known as "legal highs" before a blanket UK-wide ban came into force in May last year.
Offenders who break the new laws face up to seven years in prison.
In 2015, more than 100 deaths in the UK were linked to "legal highs".