Former Kedah menteri besar Mukhriz Mahathir has filed a defamation suit against ex-DAP vice chairperson Tunku Abdul Aziz Tunku Ibrahim, over  the latter's allegation of a secret pact between his father Dr Mahathir Mohamad and DAP stalwart Lim Kit Siang.

The suit was filed on the former MB's behalf at the Kuala Lumpur High Court registry, earlier today by the law firm of Haniff Khatri.

In his statement of claim, Mukhriz who is also Parti Pribumi Bersatu Malaysia (Bersatu) deputy president, said Tunku Aziz since December last year, had accused Mahathir of offering Lim the post of deputy prime minister, if Mukhriz was made PM in the event of an opposition win.

The allegation, Mukhriz claimed, meant that he was involved in the secret pact, that he was not sincere and transparent politically, that he had gone behind other opposition members' back in making the deal to make himself PM and Lim, DPM.

The statements uttered by Tunku Abdullah, stated Mukhriz, also made him appear power hungry, had betrayed the trust of the voters and people by hiding the purported plot, that he does not have principles and morals, and that he is a politician who followed his father's directions.

Prior to this, Mukhriz said he had filed a suit against Prime Minister Najib Abdul Razak and his press secretary Tengku Sarifuddin Tengku Ahmad for alleging that he and Mahathir had conspired to topple the existing government.

Mukhriz had made a statutory declaration in an affidavit denying such allegations in the alleged conspiracy.

Hence, the former Kedah MB alleged that Tunku Aziz maliciously issued the statement resulting in public odium for allegedly involving himself in the purported plot.

He further alleged that the defendant had acted maliciously and his actions were closely related to the propaganda brought by Prime Minister Najib Abdul Razak.

Following this, Mukhriz was seeking an injunction prohibiting Tunku Aziz from repeating such allegation. He was also seeking general and exemplary damages from the court.