Legendary musician Gregg Allman has canceled all of his tour dates through October, citing unspecified "serious health issues."

The 68-year-old Southern music icon has canceled a series of summer and fall dates, beginning with an Aug. 12 show at the Peach Music Festival in Scranton, Pa., and running through Oct. 16, when he was slated to play at a jazz festival in Clearwater, Fla. He is currently undergoing treatment at the Mayo Clinic for an undisclosed illness.

According to a post on his Facebook page, the legendary Allman Brothers Band singer and solo star will return to the stage on Oct. 29 at the Lakewood Amphitheatre in Atlanta, where he will take the stage for his own Laid Back Festival.

"I want to thank my fans and friends for supporting me while I rest up and focus on getting better and back on the road as soon as I can," he says. "I've been working hard with my band, my pride and joy, to play our music for everyone. We'll see y'all in October."

The singer is best known for a soulful mix of Southern rock and blues, but he's also been a huge influence on a number of country musicians. In 2014 many of them paid tribute to his music at the All My Friends: Celebrating the Songs and Voice of Gregg Allman concert in Atlanta. Eric Church, Trace Adkins, Brantley Gilbert and Martina McBride were among the stars on hand for that special evening.

Allman's had a pretty tough year on the road in 2016. In April a tour bus carrying his crew crashed in West Virginia, and three people were hospitalized.

The Grammy-winning music legend has a long history of health problems. He has famously struggled with addiction off and on for decades, and he was diagnosed with Hepatitis C in 2007. Allman underwent a liver transplant in 2010, and then underwent lung surgery in 2012 after an infection forced him to cut short a tour of Europe.  He detailed his unusually colorful life in a 2012 autobiography, My Cross to Bear.

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