Kedah Menteri Besar Mukhriz Mahathir has refuted claims that his father, Dr Mahathir Mohamad, masterminded the ongoing attacks against Prime Minister Najib Abdul Razak's handling of the 1MDB controversy.

"Talks of how my father was involved with editing facts or emails does not arise at all. This is a very unfair allegation," Mukhriz said in his speech at a breaking of fast function at PWTC last night.