Papua New Guinea's prime minister says he'll resign if an inquiry into a controversial loan finds him guilty of improper practice.
James Marape has promised to launch an inquiry into a $US1.2 billion loan from the Swiss bank UBS, which was used by the government to buy a stake in the resource company Oil Search.
An Ombudsman Commission report tabled in parliament last week suggested former prime minister Peter O'Neill may have broken the law in taking out the loan.
The report also implicated Mr Marape, who was finance minister at the time.
In parliament yesterday, Mr Marape said all players in the loan saga - including himself - will be scrutinised by a commission of inquiry.