All-Blacks great Jonah Loomu passed away unexpectedly in Auckland, confirms his doctor.
He was 40 years old.
Lomu had suffered from health problems since his retirement in 2002 due to a rare kidney disease known as Nephrotic syndrome.
He had been receiving dialysis treatment for the past 10 years.
He underwent a life-saving kidney transplant in 2004 before his body rejected the organ in 2011.
Lomu played in 63 Tests for New Zealand after making his debut in 1994.
He scored 37 tries and is renowned for his physical and brutal running game.