Limp Bizkit bassist Sam Rivers’ death was called in as a possible cardiac arrest, according to authorities. A spokesperson for the St. Johns County Fire Rescue in Florida confirms to PEOPLE that they responded to a call for a “nonresponsive person in cardiac arrest” at Rivers’ home on Oct. 18, the day he died. He was 48.

As the music world mourns the devastating loss of Limp Bizkit rocker Sam Rivers — who died Saturday, October 18 at age 48 — more details are coming to light about the musician's death.