Three opposition MPs have called for the four 'Tan Sri' leading the special taskforce investigating links between Prime Minister Najib Abdul Razak and 1MDB to step aside, saying their independence is questionable.

"The capability of the special task force investigating The Wall Street Journal regarding 1MDB's cash flow, which allegedly went into Najib's personal accounts, is questionable.

"This is because the four Tan Sri heading the investigation are 'lower officers' to the person being investigated, their 'leader' the prime minister," PJ Selatan MP Hee Loy Sian, Shah Alam MP Khalid Samad, and Segambut MP Lim Lip Eng ( photo ) said in a statement today.

The four Tan Sri refers to attorney-general Abdul Gani Patail, inspector-general of police Khalid Abu Bakar, Malaysian Anti-Corruption Commission chief Abu Kassim Mohamed, and Bank Negara governor Zeti Akhtar Aziz, who are heading the task force.

Hee, Khalid and Lim want the quartet to be replaced, and for a Royal Commission of Inquiry to take over the investigation.

"On the principles of transparency and independence, and also to protect the prime minister's good name, we are sure that the four Tan Sri would not object to let someone else take their place in the special task force," they said.

The MPs also said that if the four do not take a backseat, the people will have a hard time believing the findings of the task force.

The task force is invetigating allegations that RM2.6 billion had been pumped into Najib's ( photo ) personal accounts.

It raided the 1MDB office in Kuala Lumpur today and took away some documents. It has previously raided three other firms linked to the investment firm.

The task force also announced yesterday that six bank accounts have been frozen in relation to its probe into 1MDB, three of which, Malaysiakini has been informed, belonged to Najib.