Olympic swimmer Grant Hackett has been released from custody.
No charges have been laid.
The Olympic swimmer was arrested earlier today at his parents house on the Gold Coast.
"This is not Grant Hackett... he’s there in body but he’s not there in mind, soul or spirit,” the swimmer's brother told Nine News after his arrest.
The 36-year-old father's Nev said his son has been arrested over ‘mental health issues’, Courier Mail report.
7News Gold Coast have reported that witnesses say Hackett was "going off" and stabbing a knife into a chopping block.