Australian rugby is mourning the death of former Wallabies lock Dan Vickerman at age 37.

The Australian Rugby Union confirmed that Vickerman died at his family home in Sydney overnight.

It is understood there were no suspicious circumstances.

Born in South Africa, Vickerman moved to Australia at age 21 and went on to play 67 Tests for his adopted nation from 2002-2011.

“The rugby world is in shock today after news of the tragic passing of Dan Vickerman,” said ARU CEO Bill Pulver.

“Dan was an uncompromising competitor who forged a wonderful international rugby career despite a number of injury setbacks along the way.

“He was an enforcer on the field and a much-loved character off the field.

“He cared deeply about the game and the players, helping players transition into life after rugby in his role with RUPA following his retirement.

“Our thoughts and prayers are with Dan’s family at this extremely difficult time.”

Rugby Union Players Association CEO Ross Xenos said: “On behalf of all players, we extend our deepest sympathies to Dan’s young family at this difficult time. We are truly shocked and united in our despair.

“Dan was universally respected by his peers and the rugby community during and beyond his playing days.

“Since retiring, he was very generous in giving back to the game through coaching and voluntary roles supporting players’ off-field development.

“We encourage all players who are affected by today’s terribly sad news to support and be there for each other and to contact RUPA if they would like to talk.”

Readers seeking support and information about suicide prevention can contact Lifeline on 13 11 14.

MensLine Australia 1300 78 99 78.