The Roos say historical racism allegations at Hawthorn involving Clarkson are a key factor in the coach stepping away indefinitely from the Kangaroos.

Brett Ratten will coach the club.

“The club is providing its full support to Alastair and we commend him for making this important decision to put his health first,” North Melbourne president Sonja Hood said in a statement on Thursday.

“Everyone involved has been deeply affected by the Hawthorn investigation and the burden on Alastair has been significant.

“We will give Alastair whatever time he needs to restore his health and look forward to welcoming him back when he is fully fit.

“We have strong leaders at our club who will step up and support and coach our team while Alastair spends time focusing on his health.

“We are fortunate to have someone of Brett Ratten’s experience and capability to coach the team in the interim.”

The AFL in October last year named a panel set up to investigate allegations of racism levelled at former Hawthorn coaches Clarkson and Chris Fagan. Both coaches denied any wrongdoing.

The panel was expected to deliver its findings in December, but is ongoing. Last week, Clarkson hit out at Hawthorn and said it should be investigated over the saga.

-with AAP