Toto bass-player Mike Porcaro has died at 59 after a long battle with motor neurone disease (MND), also known as ALS.
The rock band is best known for its hits Africa and Rosanna.
Toto, which broke up in 2008, reformed in 2010 to raise money for Mike Porcaro and raise awareness of his illness.
Also known for the hit Hold the Line, Toto sold 35 million albums.
Toto guitarist Steve Lukather wrote on Facebook that Mike Porcaro was “now at peace”.
Motor neurone disease, also known as amyotrophic lateral sclerosis (ALS)or Lou Gehrig’s disease, is a rare condition which attacks the nervous system.
As the condition progresses sufferers find basic activities such as walking, speaking and breathing increasingly difficult.
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