Parti Amanah Negara (Amanah) president Mohamad Sabu used to be one of former premier Dr Mahathir Mohamad's biggest critics, especially with regard to the Memali tragedy.

Asked today whether Mahathir should apologise over the incident as suggested by PAS, Mohamad said it was up to the nonagenarian to do so, stressing it was now purely an election issue.

"That is up to him, I cannot give my view on it," he told reporters at a press conference after officiating Federal Territories Amanah's convention in Kuala Lumpur today.