The Pima County Medical Examiner has confirmed the cause of death for rapper Lil Peep who passed away on his tour bus outside the Rock nightclub on Nov 15.

Read more: Lil Peep brought something truly unique to the scene

Autopsy and toxicology reports, shared in a news story by KVOA News 4 Tucson, have revealed the rapper's cause of death as a combined toxic effect from fentanyl and Alprazolam, a generic form of the anti-anxiety drug Xanax. A number of other drugs were also listed as being present in Lil Peep's system.

The Medical Examiner has ruled the manner of death an accident. The toxic combination of fentanyl and Xanax is known to cause respiratory distress, coma and possible death. 

According to the toxicology report, Lil Peep tested positive for Tramadol, cocaine, Oxycodone and a number of other opiates. No alcohol was found in his system. 

Lil Peep's brother Oskar spoke to People back in November stating he believed his brother's death was an accident

“We have heard there was some sort of substance he did not expect to be involved in the substance he was taking,” said Oskar when speaking to People. “He thought he could take what he did, but he had been given something and he didn’t realize what it was. It was an accident; it really was an accident. He was super happy with where he was in life.”

Lil Peep died at the age of 21 in Tucson, Arizona while wrapping up the final U.S. dates on his Come Over When You're Sober tour.