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LOS ANGELES — Maurice White, co-founder of Earth, Wind & Fire, died in his sleep Thursday morning, according to TMZ.

White died in Los Angeles after a long battle with Parkinson’s disease. He was diagnosed in 1992 and his condition deteriorated in recent months, TMZ reports. The disease had progressed to the point he was forced to stop touring in with the band 1994.

The band had a string of hits, including “Shining Star,” “September,” “Boogie Wonderland” and “After the Love has Gone.”

White’s brother, Verdine, is also a band member.

Although White wasn’t touring, he remained involved in the decisions involving the band, TMZ reports.

White was 74 years old.