Scottish police are investigating whether a teenager who died at a Rockness took a “legal high” drug used by two of his friends, who have been hospitalised. Alex Heriot, 19, from the Portobello area of Edinburgh, died on Saturday night after collapsing next to the main stage at RockNess, near Inverness. Two friends aged 19 and 20 who were in the same group as Mr Heriot – and had taken the drug Benzo Fury - became ill and were taken to Raigmore Hospital in Inverness. RockNess event commander Superintendent Stevie Mackay said: “Early indications are that the man may have consumed drugs and this is one of the lines of inquiry at this stage. A post-mortem will be carried out to determine the cause of death.” In a completely separate road incident two other people died when a coach ferrying festival goers to the event collided with a van on the A9 near Ralia in the Highlands. The deceased were named as Mark McFarlane and Barry Murray, both from the Glasgow area.