Foo Fighters drummer Taylor Hawkins had 10 different substances in his system at the time of his death, Colombian officials said.
The 50-year-old was playing on the South American leg of the band’s world tour when his sudden death was announced on Saturday.
In a statement following an initial forensic examination, the Colombian Attorney General’s Office said a preliminary urine toxicology test indicated the presence of 10 different substances, including marijuana, antidepressants and opioids.
The statement continued: “The National Institute of Forensic Medicine continues to conduct the necessary medical studies to ascertain the cause of death.
“The Attorney General’s Office will continue to investigate and will duly inform the findings of forensic examinations in due time.”
The rock group played in Argentina last Sunday and were due to perform in Bogota on Friday night.
It comes after the Bogota municipal government said the city’s emergency centre received a report of a patient with “chest pain” and sent an ambulance on Friday evening.
Paramedics attempted to revive Hawkins but there was no response and he was declared dead at his hotel in northern Bogota, the statement added.
The band, fronted by former Nirvana star Dave Grohl, said they were “devastated by the untimely loss” and asked for the privacy of Hawkins’ family to be respected.
Tributes have poured in from titans of the music industry, with Queen drummer Roger Taylor comparing his death to “losing a younger favourite brother”.
“He was a kind brilliant man and an inspirational mentor to my son Rufus and the best friend one could ever have. Devastated,” he said.
Meanwhile Queen guitarist Brian May said he is “heartbroken” adding that Hawkins was “family to us”.
Hawkins will appear on May’s upcoming remastered second solo album, Another World Revisited.
Blink-182 drummer Travis Barker remembered the days when Hawkins played with Alanis Morissette before playing for the Foo Fighters, adding that he was “sad” he would never see him again.
“I’ll never forget Laguna Beach days when I was a trash man playing in a punk rock band and you were playing with Alanis.
“You’d come watch me play in dive bars and be like, ‘kid you’re a star’.
“And I thought you were crazy but you gave me so much hope and determination.
“Years later we toured together with Blink and Foos in Australia and I have the best memories of smoking cigarettes in the restroom of flights we were on together and watching your set every night.
“To say I’ll miss you my friend isn’t enough. Till the next time we talk drums and smoke in the boys room.”
Hawkins was born in Fort Worth, Texas, in 1972 and raised in Laguna Beach, California.
He is survived by his wife Alison and their three children.