SHOWS: BARCELONA, SPAIN (FILE - NOVEMBER 24, 2012) (IAAF) 1.
PETER SNELL AT IAAF CENTENARY GALA QUEENSTOWN, NEW ZEALAND (FILE - JUNE 5, 2000)(HANDOUT - ACCESS ALL) 2.
SNELL ON MOUNTAINTOP HOLDING FLAME FOR OLYMPIC TORCH RELAY AHEAD OF SYDNEY 2000 SUMMER GAMES 3.
SNELL CARRYING OLYMPIC TORCH AND HANDING OFF TO NEW ZEALAND OLYMPIC SKIER ANNELISE COBERGER SYDNEY, AUSTRALIA (FILE - JUNE 22, 1999)(STILL PHOTO-MUTE)(REUTERS - ACCESS ALL) 4.
STILL PHOTO OF SNELL STORY: Famed New Zealand Olympic middle distance runner Peter Snell has died in Dallas at age 80, the New Zealand Herald reported on Saturday (December 14).
The newspaper reported sports historian and friend Ron Palenski confirmed Snell had died at his Texas home on Thursday (December 12) after years of heart problems. Palenski said Snell's wife Miki had telephoned him to share the news.
Snell, considered New Zealand's greatest athlete, won three Olympic gold medals.
He took the 800 metres at the 1960 Rome Games and won both the 800 and 1,500 metres at the 1964 Tokyo Games.
He is the only man since 1920 to have won both events at the same Olympics.
"Peter Snell was to running what Sir Edmund Hillary was to mountaineering," friend and Olympic marathoner Barry Magee once said.
New Zealand Prime Minister Jacinda Ardern remembered Snell as "a legend, here and around the world.
Our thoughts are with Sir Peter's wife Miki and their family." Under the guidance of famed coach Arthur Lydiard, the powerfully built Snell became one of the most dominant middle-distance runners in history.
He set world records in the mile and 800 metres and also won dual gold at the 1962 Commonwealth Games in Perth.
Snell was preparing to celebrate his 81st birthday on Tuesday.
His wife Miki told New Zealand's Stuff her husband was having a good day on Thursday, despite a health scare last month when he passed out while driving and crashed into several parked vehicles.
"He felt good, he had gone and done some activities, and was planning on doing more - he wanted to play table tennis," Miki told the publication.
"He lay down to watch the news on TV and fell asleep.
"I tried to wake him up but he wouldn't move.
The paramedics came in about five minutes but they couldn't wake him." Snell retired from running in 1965 and later became a sports scientist in the United States.
His work mainly focused on the kind of extreme performance he had personally achieved.
"I really wanted to know what made athletes tick...[and] try to understand why Arthur Lydiard's training methods worked so well," he wrote in "Peter Snell: From Olympian to Scientist" in 2007.
Although living in the United States, Snell was always admired in New Zealand.
He was elevated to Sir Peter Snell in 2009 and was voted New Zealand's Sportsman of the Twentieth Century.
(Production: David Grip)