Police are investigating the death of a 19-year-old man who is believed to have taken fake ecstasy pills.
Officers were called to an address on Chapel Street, Leabrooks, at about 11.20pm on Saturday.
He was taken to hospital and later pronounced dead.
The death is being investigated as being related to the taking of so-called ecstasy tablets.
Initial tests on tablets recovered indicate that they do not contain any genuine ecstasy – but further tests will be required to find the exact ingredients.
A 16-year-old boy and an 18-year-old woman have been arrested in connection with supplying drugs. They have been released on bail pending further inquiries.
Various other people have been spoken to in connection with the investigation.
A Derbyshire police spokesman said: “We want to take this opportunity to warn again about the dangers of taking illegal drugs, which can have tragically fatal consequences.
“Users of drugs should also be aware that the drug they buy may not contain what they are expecting.”
For further information on the dangers of drug taking, visit www.talktofrank.com and www.doyouknowwhatsinit.org.uk
Anybody with information about the supply of illegal drugs should ring their local police on 101 or Crimestoppers on 0800 555 111.