KUALA LUMPUR:  Malaysian Prime Minister Najib Razak is facing the risk of criminal charges over allegations that hundreds of millions of dollars were funneled from an indebted state fund to his personal bank accounts, the first time a Malaysian leader has faced criminal allegations. The attorney general confirmed late Saturday that he has received documents from an official investigation that made the link between Najib and the investment fund 1MDB. The existence of the documents was first reported by the Asian Wall Street Journal on Friday, showing some $700 million were wired from entities linked to the fund into Najib's accounts. The documents sent to the attorney general pave the way for possible criminal charges. It is one of the worst political crises for Najib, who has come under increasing criticism over his leadership. He has denied taking any money for personal gains. 'It's damning and disastrous for Najib,' said Wan Saiful Wan Jan, who heads the Institute for Democracy and Economic Affairs think-tank. 'This is really uncharted territory in Malaysian politics. For the first time ever, we are seeing a prime minister facing the possibility of a criminal charge,' he said. 1MDB, set up by Najib in 2009 to develop new industries, has accumulated 42 billion ringgit ($11.1 billion) in debt after its energy ventures abroad faltered. Critics, led by former Prime Minister Mahathir Mohamad, have voiced concerns about 1MDB's massive debt and alleged lack of transparency. The Wall Street Journal report said five deposits were made into Najib's accounts and that the two largest transactions, worth $620 million and $61 million, were done in March 2013 ahead of general elections. Najib slammed the report as part of a 'political sabotage' by Mahathir to remove him. Mahathir, who stepped down in 2003 after 22 years in power but has remained an influential political figure, has been leading calls for Najib to step down. 1MDB said it has never provided any funds to Najib. Attorney General Abdul Gani Patail, however, said a task force investigating 1MDB for alleged impropriety has given him papers 'including documents related to allegations of fund transfer into the account of the prime minister.' Abdul Gani said the task force raided offices of three companies linked to 1MDB that were allegedly involved in the fund transfer. He didn't give further details on the documents or say what actions would be taken. The Star English-language newspaper said on its website that Najib would file a lawsuit against The Wall Street Journal on Tuesday. An aide to the prime minister said Najib would make a statement later Sunday, but didn't give details. Najib's deputy, Muhyiddin Yassin, said the allegations must be investigated because they tarnish Najib's credibility and integrity. Opposition lawmakers have said Najib should go on leave and also declare his assets. Home Minister Zahid Hamidi said the allegations against Najib were 'reckless' and 'bordering on criminal offenses' because they were based on unverified documents. He warned that police would 'not hesitate to use the full force of the law against those who attempt to harm Malaysia's economy and our democratic process.' 'Even if nothing comes up from the investigation, the damage to Najib's reputation has been done. The pressure for him to step down will increase,' said Wan Saiful, the head of the think-tank. Najib, the son of a former prime minister, took over the premiership in 2009. He has fought criticism over his management of the economy, and being implicated in the murder of a Mongolian model nine years ago. Najib has said he had nothing to do with the model, and two security officers linked to Najib at the time were found guilty of her murder.