A 19-year-old man collapsed in the main arena of the festival on Saturday night and died early this morning at Raigmore Hospital in Inverness.
A second 19-year-old man and a 20-year-old woman were also taken to the hospital earlier today and are recovering.
Drugs are believed to be involved in all three incidents. Police and health authorities say they are particularly concerned about a “legal high” or designer drug known as Benzo Fury.
In a statement the Northern Constabulary said they were making inquiries into Benzo Fury “which it is believed may have been taken by those who are currently being treated in hospital”.
It added: “This is not a controlled drug. It may, however, be very dangerous, particularly if consumed with other substances.”
Designer drugs are slightly modified versions of illegal substances which the manufacturers hope will circumvent drug laws. Because of this they are difficult to control.
A spokesman for the charity Drugscope said that often trade names were switched to different products so it was impossible to know for certain what might be being taken.
“All you have to do is tweak the chemical formula and it is no longer illegal,” he said. “If people take ecstasy or ketamine they know there is a risk. But because these are marketed as ”legal highs“ they can assume they are therefore safe. The message has to be that they are not.”
Benzo Fury is marketed on the internet. Also known as 6-APB it is a stimulant based on MDA, a psychedelic drug similar to ecstasy.
Public Health Consultant Dr Cameron Stark added: “Our advice is simple: limit how much alcohol you drink, and don’t take none prescribed drugs.
If however you have taken non prescribed drugs including “legal highs”, it is really important that you don’t combine them with alcohol. If you feel unwell or you are worried about a friend, please get immediate advice from the onsite medical team.“
Jim King, the organiser of the Rockness Festival, added: “What should be very clear from this information is that legal highs does not mean safe, and customers should not go anywhere near these dangerous substances. Festival goers should heed the advice given to them by the health professionals and the police, and stay safe by avoiding drugs of any kind.”
If anyone has any information they should contact police on 01463 715555 or speak to any officer.