KUALA LUMPUR (The Star/Asia News Network) - Former premier Tun Dr Mahathir Mohamad and two other former members of the ruling Umno party sought the High Court's leave on Tuesday (April 19) to stop Prime Minister Najib Tun Razak from accessing his assets, bank accounts and shares.

The two others are former Batu Kawan Umno division vice-chief Datuk Seri Khairuddin Abu Hassan and former Langkawi Wanita Umno member Anina Saadudin.

They want the court to prevent Datuk Seri Najib from transferring or reducing his assets - not limited to any land, cash and company shares - whether under his name, nominee or jointly, allegedly to be worth RM2.6billion (S$900 million).

The sum is about the amount Najib had accepted as a personal donation from the Saudi royal family before the general election in 2013.

The three applicants also want the court to compel Najib to disclose his assets within 10 days of its order.

Apart from seeking costs, they want Najib to specify all his assets in a sworn affidavit to be filed in court.

The court papers were filed at the High Court at about 10.40am on Tuesday.

Their lawyer Mohamed Haniff Khatri Abdulla confirmed that the application was filed for the main civil suit.

In the suit, the trio had sued Najib for alleged misfeasance in public office and breach of fiduciary duties in his position as Prime Minister, chairman of the ruling alliance Barisan Nasional and Umno president.

They want the High Court to order the Prime Minister to pay the Government RM2.6 billion in exemplary damages and another RM42 million in aggravated damages.

Mahathir quit Umno in February and has stood with the opposition in calling for Najib to resign over the scandal over state investment fund 1MDB, which had accumulated RM50 billion in debt up to January this year, and the premier's acceptance of a US$681 million (S$915 million) donation from the Saudi royal family.