The cause of death for country music singer Luke Bell has been revealed.
An autopsy report obtained by Fox News Digital states that Bell died of a fentanyl overdose. The manner of death has been ruled an accident.
The musician died in Tucson, Arizona, police authorities confirmed to Fox News Digital in August. He was 32.
According to the autopsy report, Bell was reportedly found unresponsive by a passerby in a shaded area of a parking structure. Drug paraphernalia was also found.
"In consideration of the known circumstances surrounding this death, the available medical history, and the examination of the remains, the cause of death is ascribed to fentanyl intoxication," the Pima County Medical Examiner's Office wrote in the report. "The manner of death is accident."
Six days prior to his death, Bell was reported missing by the Saving Country Music blog. According to the outlet, he was on a trip to Tucson with his close friend and fellow country recording artist Matt Kinman when he suddenly vanished.
Kinman said, "We came down here to Arizona, to work down here, play some music, and he just took off. He was in the back of the truck. I went in to get something to eat. I came out, and he’d got out of the truck and left."
The blog also noted that Bell suffered from bipolar disorder. In August, Kinman confirmed to Saving Country Music that the Wyoming-native had been found dead not far from where he had disappeared in Tucson.
According to the outlet, Bell was "hiding a severe battle with bipolar disorder that he ultimately would never shake" and had disappeared several times before. The website reported that he would "end up in hospitals, or at times, incarcerated."
Bell's condition had reportedly improved over the last year and half due to medication and treatment. However, Kinman said that there had been a recent change in Bell's medication, which he feared could have contributed to his disappearance.
After Bell's death, a number of celebrities paid tribute to the singer on social media and emphasized the need for more mental health awareness and support.
"Word just came down on the passing of Luke Bell and we’re heartbroken over the news," Mike and the Moonpies wrote in a Facebook post in part.
Bell's family also issued a statement, telling Fox News Digital, "We have lost our beloved son, brother and friend and we are heartbroken," Bell's relatives said.
They continued, "Luke had a gentle heart, a wanderer’s spirit and a musical gift that he was fortunate to share with us and the world. We are so grateful to his friends and fans for embracing Luke and his music. We would like to thank all of Luke’s fans, friends and family who have been sharing stories and photos of happy times with him."
"Unfortunately Luke suffered from the disease of mental illness, which progressed after his father's death in 2015. Luke was supported through his disease by a community of loving family and friends.
"Despite this, he was unable to receive the help he needed to ease his pain. Our hearts go out to the millions of people affected by mental illness who, like us, understand the devastating disappointment of a system that consistently fails to provide caring solutions to those who suffer," the statement added.
Bell, who hailed from Cody, Wyoming, first rose to prominence on the country music scene in 2014 with the release of his first album "Don't Mind If I Do." He was signed to the label Thirty Tigers in 2016 and gained further recognition after releasing his self-titled second album later that year.
Over his career, Bell worked with Price, Alabama Shakes, and Langhorne Slim and performed supporting slots for Willie Nelson, Dwight Yoakam, Nitty Gritty Dirt Band and Hayes Carll, according to The Boot.
Fox News’ Ashley Hume contributed to this report.