1MDB has said all parties should not politicise the Swiss investigation in PetroSaudi International (PSI), the former joint-venture partner of 1MDB.

"1MDB asks all parties to refrain from politicising any alleged investigation by the Swiss authorities on non-Malaysian nationals, and, during this sensitive general election period, desist from trying to create links to 1MDB for political gain," it said in a statement today.

According to London-based Financial Times, Swiss prosecutors are probing two PSI officials suspected of fraud, bribery and aggravated money laundering. 

The international daily, citing unnamed Swiss officials, said that this was part of a wider probe on the alleged misappropriation of 1MDB funds.

The US Department of Justice, which is conducting a parallel investigation, claimed at least US$1.03 billion of US$1.83 billion of 1MDB funds intended for its joint-venture with PetroSaudi was diverted to Good Star Limited, a company owned by Malaysian businessperson Low Taek Jho.

1MDB, in a statement today, stressed that it was not implicated in the Swiss probe.

"There is no suggestion of wrongdoing by 1MDB or any of its officials. So it is irresponsible and reprehensible for an act by Swiss investigators to be twisted and framed as an inquiry into 1MDB and its shareholder.

"We wish to state in the strongest possible terms that 1MDB is not the subject of any criminal investigation either in Malaysia or internationally," it said.

1MDB added that it was ready to assist investigations of any lawful authority in line with international protocols, but have yet to receive any such request.

By convention, international authorities do not communicate directly with entities within Malaysia, but have to go through the Attorney-General's Chambers through a Mutual Legal Assistance (MLA) request.

Swiss authorities have made multiple MLA requests to the AGC, but have yet to receive any forthcoming response.