Jeff Conaway

Jeff Conaway (Getty Images)

ENCINO, Calif. (KTLA) -- Coroners officials confirm Sunday that an autopsy for Jeff Conaway, who starred in "Taxi" and "Grease," has been completed but is still pending toxicology results.

Conaway, 60, was taken off life suppor Friday morning after 2 weeks in a coma.

Toxicology tests could take up to eight weeks, coroners officials said.

Conaway was found unconscious on May 11 and was rushed to Encino Hospital Medical Center.

He had apparently been unconscious for nearly 9 hours before anyone found him, manager Phil Brock said.

Conaway had reportedly suffered from pneumonia and sepsis. The Los Angeles County Coroner is scheduled to conduct an autopsy to determine the cause of death.

Celebrity addiction expert Dr. Drew Pinsky tweeted Friday that Conway was being kept in a Propofol-induced coma.

After learning of his death, Pinsky posted again.

"I'm saddened to report he has succumbed to his addiction, thus far we have no evidence of an intentional overdose, rather this is the natural history of prescription drug addiction, pneumonia, septic shock, etc," he tweeted.

Initial reports that Conaway suffered a drug overdose were inaccurate, a source with knowledge of his medical condition said last week.

However, his use of drugs caused him not to realize how ill he was, keeping him from getting treatment for pneumonia until it was too late, the source said.

Conaway gained fame as Kenickie in the 1978 musical movie 'Grease' and the television series 'Taxi.'

He struggled with substance abuse for decades.

In January 2010, Conaway suffered a broken hip and other serious injuries after falling at his home.

Conaway appeared on VH1's 'Celebrity Fit Club' in 2008 and later on 'Celebrity Rehab,' where he admitted to being addicted to cocaine, painkillers and alcohol.