Guitarist Matt Roberts, a founding member of the rock band 3 Doors Down, has died at the age of 38.

The musician was in West Bend, Wisconsin to perform at a benefit.

3 Doors Down' Brad Arnold, front, and Matt Roberts, right rear, during a performance
Matt (right) with band member Brad Arnold (Tim Sharp/AP)

The West Bend Police Department said someone called authorities at around 7am local time on Saturday to report an unconscious man in a hotel hallway.

Police and firefighters found Roberts dead.

The police statement says there were no signs of trauma and the cause of death was not immediately known.

FILE - This May 17, 2008 file photo shows, from left, Todd Harrell, Brad Arnold, and Matt Roberts, of 3 Doors Down performing during a concert before the NASCAR Sprint All-Star Race at Lowe's Motor Speedway in Concord, N.C. Harrell has been suspended indefinitely from the band following his DUI arrest. Todd Harrell was charged Tuesday in Mississippi with a second-offense DUI involving a substance other than alcohol. The rock group says in a statement Thursday that Harrell has been suspended to “protect the image and integrity of the band.” (AP Photo/Gerry Broome, File)
Matt (right) with the band (Gerry Broome/AP)

Matt left 3 Doors Down in 2012 for health reasons.

According to Billboard, he helped create the band with vocalist Brad Arnold and bassist Todd Harrell.

The band’s biggest hit was the 2000 song Kryptonite, which was nominated for a Grammy Award.