Tributes have been paid to two 19-year-old teenagers who died after collapsing at a Plymouth nightclub.
Police say they took what they thought was MDMA. MDMA is a form of the drug ecstasy.
Aaron Reilly and Joshua Brock have been described as "kind" and as men with a "great sense of humour".
Josh who was studying for a diploma in aircraft engineering, was said to be a loving son and loyal friend.
His family said the incident was “totally out of character” and that "one moment of madness lead to this tragedy".
Aaron's family said he loved to skate and play computer games.
Kian Reilly, Aaron’s younger brother, said he "tried so hard to follow in his footsteps" and now "no longer have anyone to look up to".
They were part of a larger group who had gone to see the DJ Basshunter perform at Pryzm nightclub on the night of Friday, 8 December.
Emergency services were called to Pryzm nightclub at around 1:40am on Saturday morning, where the two men were found unconscious.
They were taken to Derriford Hospital where they later died.
An 18-year-old man was arrested and has been released under investigation.
DJ BassHunter on that Friday tweeted:
Detective Inspector Julie Scoles says taking unknown substances is incredibly dangerous.
A spokesperson from the nightclub also issued condolences to the families.
Police are urging anyone with information to call 101 or email firstname.lastname@example.org quoting log number 67 for 9 December.
Crimestoppers can be contacted anonymously by calling 0800 555 111 or reporting online www.crimestoppers-uk.org.