New Zealand have extended the contracts of assistant coach Ian Foster and forwards coach Mike Cron following the team's World Cup triumph in England.

Foster, who joined the setup to work alongside head coach Steve Hansen in 2012, has a record of 49 wins, two draws and just three defeats.

Both Foster and Cron have penned contracts which will run until 2017.

"It's been an honour and a privilege to have worked for the All Blacks over the last few years and to help the team achieve its goals, including winning the Rugby World Cup, and I look forward to getting stuck into next season after the summer break," said Foster.

Cron said: "I'm really enjoying the environment and the next couple of years will be an exciting challenge for the coaching team as we look to identify talent and help develop them into world-class rugby players."

New Zealand became the first team to retain the World Cup trophy and win the tournament three times.