Olympic gold medallist Grant Hackett has been arrested on the Gold Coast.
The swimmer has been taken into custody at Southport watchhouse.
The 36-year-old father's Nev said his son has been arrested over ‘mental health issues’, Courier Mail report.
Police were reportedly called to Hackett's home in Mermaid Waters earlier today after a disturbance.
7News Gold Coast have reported that witnesses say Hackett was "going off" and stabbing a knife into a chopping block.
Hackett's arrest comes after his publicised in-flight incident last year where he reportedly grabbed the nipple of a fellow plane passenger.
More to come on this story.