Police are investigating the death of a teenager from Ayr who fell ill after a night out.
Jordan Kiltie, 19, was taken to hospital on Sunday morning but declared dead on arrival.
His mother has told STV News that the "legally high" drug mephedrone is responsible for his death after traces of the substance were found in his bedroom.
It is thought he may have taken a number of substances but police said they could not comment on reports that the cocktail may have been linked to the controversial drug.
A spokeswoman for Strathclyde Police said: "We can confirm that a 19-year-old man was taken to Ayr Hospital at around 10.40am on Sunday March 14 but was found to be dead on arrival.
"At this time, we cannot confirm the exact cause of death. Further tests will be carried out. These tests may take some time."
The Scottish Government have stepped up calls for mephedrone to be outlawed following the deaths of two teenagers in England.
Mephedrone, known by the street names "meow meow" and "bubbles", had been taken by Louis Wainwright, 18, and Nicholas Smith, 19, before they died in Scunthorpe, Yorkshire, on Monday.
Ayr MSP John Scott is in no doubt that the drug should be banned. He said: "I think it is time that we have it withdrawn, in the very least in the short term, until a proper evaluation is carried out.
Tributes to the teenager poured into his social networking site. Friends writing on his Bebo page voiced their shock at the sudden death.
One message said: "Jordan Kiltie Gone but not forgotten. Jordan was always the funny one at the partyz he alwayz put a smile on everyones face. Hez was adored by everyone who knew him. Still cant belive hez gone. He will always remain in our heartz always and forever. Love yhoo gawjus Sleep tight xcxcxcxc."
The Scottish Government yesterday stepped up calls for mephedrone to be outlawed following the deaths of two teenagers in England.
Mephedrone, known by the street names "meow meow" and "bubbles", had been taken by Louis Wainwright, 18, and Nicholas Smith, 19, before they died in Scunthorpe, Yorkshire, on Monday.
Holyrood's Community Safety Minister, Fergus Ewing, said the UK Government, which has responsibility for banning or reclassifying drugs, must be ready to act quickly, with mephedrone also linked to the death of a woman in Scotland this year.
'Legal high' sparks political row.
