Malaysian authorities froze six bank accounts as part of an investigation into allegations that hundreds of millions of dollars were transferred from a state investment fund to the personal accounts of Prime Minister Najib Razak.

Attorney General Abdul Gani Patail said Tuesday a special taskforce investigating the investment fund 1MDB for alleged impropriety has also seized documents related to 17 accounts at two banks for further investigation. He didn't name the banks or say who the accounts belong to.

Abdul Gani confirmed on the weekend he had received documents from investigators that link Najib and 1MDB.

The existence of the documents, which allegedly show $700 million was wired from entities linked to 1MDB into Najib's accounts, was first reported by The Wall Street Journal on Friday.