(CNN) -- Soul singer and arranger Isaac Hayes, who won Grammy awards and an Oscar for the theme from the 1971 action film "Shaft," has died, sheriff's officials in Memphis, Tennessee, reported Sunday.

Relatives found Hayes, 65, unconscious in his home next to a still-running treadmill, said Steve Shular, a spokesman for the Shelby County Sheriff's Department.

Paramedics attempted to revive him and took him to a hospital, where he was pronounced dead shortly after 2 p.m., the sheriff's department said.

No foul play is suspected, the agency said in a written statement.

Hayes won a third Grammy for pop instrumental performance with the title track to his 1972 "Black Moses" album.

From the late 1990s through 2006, Hayes provided the voice of "Chef" for Comedy Central's raunchy animated series "South Park," as well as numerous songs. {Source}