BY EOIN BLACKWELL
AAP Papua New Guinea Correspondent

PRIME MINISTER PETER O'NEILL says accusations police are intimidating his political rival Sir Michael Somare are nonsense.

Sir Michael's daughter, Betha, sent an email to journalists on Tuesday alleging members of her father's cabinet were being intimidated by police, days after the Somare faction launched a failed mutiny of PNG's armed forces.

"I wish to advise that many of Sir Michael's cabinet members are now under intimidation by the PNG Royal Constabulary," she said.

When pressed about the nature of the intimidation, Ms Somare replied "they are threatening Sir Michael's people with arrest but we do not know on what charges".

Prime Minister O'Neill says police are carrying out investigations into the failed mutiny, during which 30 soldiers tried to change the military high command and reinstall the minority Somare government.

"This is a normal police investigation carried out in the lawful way a major crime is investigated," he told the Post Courier.

"If there is evidence that Sir Michael Somare, or (his son) Arthur Somare or (his police minister) Andrew Kumbakor was involved, they will be subjected to the full force of the law.

"It is utter nonsense for Somare to suggest that myself, or Deputy PM Namah, is pushing and intimidating police to arrest him."

During the crisis, Betha Somare told journalists via text message that Sir Michael and his cabinet had backed the mutiny attempt.