New Zealand team doctor John Mayhew says legend Jonah Lomu died of a heart attack.
Lomu passed away on Tuesday aged just 40 after suffering from a long history of kidney problems.
"The final mechanism was something caused the heart to go into cardiac arrest, most probably a cardiac or pulmonary event," Mayhew told the New Zealand Morning Herald.
"Cardiac arrest is the final pathway of the heart shutting down. That's all there is really."
Jonah Lomu spent his entire career terrorising defences around the world with his juggernaut running style - we look at his best moments.Read the full story ›
The rugby world has taken to social media to pay tribute to All Black great Jonah Lomu, who has died unexpectedly aged 40.Read the full story ›
Former New Zealand rugby union international Jonah Lomu has died unexpectedly. He was 40.Read the full story ›
A teenager who was told he had just weeks to live returned to his old school to make a heartbreaking speech to his classmates.Read the full story ›
New Zealand outplayed England at the Olympic Stadium to keep the three-match rugby league Test series alive with an attritional 9-2 victory.
England, who were favourites to secure a series-clinching win after starting with a 26-12 triumph in Hull, defended heroically at times against their more enterprising opponents but were short of ideas in attack.
The Kiwis scored the only try through winger Shaun Kenny-Dowall two minutes into the second half and, although England thought they had drawn level with a try from James Graham controversially disallowed by the video referees, they could have no complaints about the final outcome.
Ground staff performed the haka and a crowd of about 4,000 people greeted the champions upon their arrival at Auckland airport.Read the full story ›
Sonny Bill Williams has been presented with a new Rugby World Cup winners medal after he gifted his to a young fan after the final yesterday.
The All Blacks midfielder said he had felt sorry for young fan Charlie Line, who had been tackled by a security guard as he ran onto the pitch at Twickenham, and wanted to make the occasion a "night to remember" for the youth.
But tournament organisers managed to "find a replacement" for two-time World Champion Sonny Bill, 30, and presented him with it at the World Rugby Awards tonight.
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Sonny Bill Williams gave his Rugby World Cup winners medal to a young boy who had been tackled by a security guard at Twickenham.Read the full story ›
Dan Carter and the New Zealand All Blacks reigned supreme at Twickenham, beating Australia 34 - 17 to become World Champions.Read the full story ›