Scott Weiland, the lead singer for Stone Temple Pilots and Velvet Revolver, was found dead on his tour bus last night, a post on his Facebook page confirmed. He was 48.

Weiland was in Bloomington, Minnesota, with his newest band, the Wildabouts, when he was discovered. The cause of death has yet to be announced, but the singer has been open about his struggle with drug addiction.

One of the founding fathers of the '90s grunge movement, Weiland formed STP with brothers Robert and Dean DeLeo and, in 1994, the band released their Number One album, Purple. The bad charted with alternative hits like "Interstate Love Song," "Sour Girl," "Vasoline" and "Wicked Garden," and Weiland drew attention with an androgynous stage presence.

In 2002, he joined Guns N' Roses' Slash, Duff McKagan and Matt Sorum in a supergroup called Velvet Revolver, with releases including Contraband and Libertad.

Even with his prodigious musical output, Weiland was plagued by demons.

Writes Billboard:

By then, Weiland had weathered several public run-ins with the law, mostly due to drug use and driving under the influence. In 1995, the singer was convicted of buying crack cocaine and sentenced to probation.

In 2003 and 2007 Weiland was arrested for D.U.I. Heroin was also a drug of choice for Weiland, who had check into a rehabilitation facility but did not finish the program, according to reports around 2007.