The cause of Isaac Hayes death remains unknown at this time. Hayes passed away on Sunday after family members found him unresponsive next to a treadmill at his home in Memphis, Tennessee.

Hayes was 65 years old and foul play is not suspected in his death. He had a stroke in 2006 and was currently being treated for a number of medical conditions. A police spokesperson said, “Family members believe at this point it is a medical condition that might have led to his death.”

Hayes had 12 children from four marriages and was a Scientologist.

We’ll update with more information on Haye’s cause of death as it becomes available.