Papua New Guinea's prime minister, Peter O'Neill, has been called upon to stand down and allow an inquiry into allegations of personal and corporate impropriety.
Former prime minister Sir Mekere Morauta made the call, saying the allegations concerned Mr O'Neill's then wholly-owned construction company, Wild Cat Developments Ltd, and a bridge-building contract with the Asian Development Bank.
The bank investigated the contract and found it to be improperly and incompletely implemented by Mr O'Neill's company.
Sir Mekere said "it raises the question - yet again - of whether Mr O'Neill is a fit and proper person to be prime minister."
The evidence of wrong-doing is overwhelming, Sir Mekere said.