STUART, Fla. (KTLA) -- Monkees star Davy Jones died with a marijuana-like drug in his system, according to newly released toxicology results.
According to an autopsy report obtained by TMZ, Jones had cannabinoids in his system, though it is not clear if it was from smoking marijuana. It was not listed as a cause of death.
The toxicology report came back negative for other drugs.
The official cause of death is still listed as a heart attack with severe build-up in his arteries.
Jones died last month at the age of 66.
Authorities released a frantic 911 call made by a woman trying to get help for Jones.
"Ambulance please, hurry!" the woman pleads in the 911 call.
She then suggests it might be faster to put Jones in a car and drive to the hospital, which was about 30 miles away.
Jones complained of breathing troubles early in the morning Wednesday, according to Rhonda Irons, a spokeswoman for the Martin County Sheriff's Office.
Jones was taken to a hospital, where he was pronounced dead, Irons said.
Jones is survived by his wife Jessica Pacheo and four daughters, all from previous marriages.
Jones, who was born in Manchester, England, was the lead singer of the Monkees from 1965 to 1971.
The group, which also included Micky Dolenz, Michael Nesmith and Peter Tork, was formed for a television show with the same name.
Bandmate Mickey Dolenz posted the following on his Facebook page, "Can't believe it...Still in shock...had bad dreams all night long. My love and prayers go out to Davy's girls and family right now..."
Michael Nesmith offered this reaction to Jones' death: "That David has stepped beyond my view causes me the sadness that it does many of you. I will miss him, but I won't abandon him to mortality.
"David's spirit and soul live well in my heart, among all the lovely people, who remember with me the good times, and the healing times, that were created for so many, including us. I have fond memories. I wish him safe travels."
The fourth member of the band, Peter Tork, also spoke out via Facebook: "It is with great sadness that I reflect on the sudden passing of my long-time friend and fellow-adventurer, David Jones. His talent will be much missed; his gifts will be with us always. My deepest sympathy to [his wife] Jessica and the rest of his family.
"Adios, to the Manchester Cowboy. Peace and love, Peter T."
Also among the first to express their sadness was Boyce and Hart, the songwriting duo who worked extensively with the Monkees, most notably penning "Last Train to Clarksville' and the Monkees theme.
"This is the saddest news ever," they wrote on their Facebook page. "We have no words to express how we are feeling
condolences and loving prayers for his family, friends and his fans; the world has lost a dear man, loving husband and father; a great talent."
The Monkees had a slew of hits in the late 1960s, including "Daydream Believer," "Last Train to Clarksville" and "I'm a Believer."
At the peak of their popularity in 1967, the Monkees sold more records than the Beatles.
The group disbanded after the TV show went off the air.
Jones continued to performed solo, and has toured throughout the years with other members as various reincarnations of the Monkees.
In 2009, Jones released an album entitled "She" that consisted of classics and standards from the 1940s to the 1970s.
Jones' last performance was on Feb. 19 in Oklahoma.
Antenna TV will air the entire Monkees series from start to finish this Saturday and Sunday.
The show can always be seen weekends at 5:00pm and 5:30pm on Antenna TV .
Autopsy: 'Monkees' Singer Davy Jones Had Pot-like Drug in System
At the peak of their popularity, the Monkees sold more albums than the Beatles.
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