A PNG detention centre guard was allegedly murdered after being bashed and drowned at the weekend and another PNG worker lost his hand in a separate machete attack.
There's also claims three Australian expat workers allegedly drugged and gang raped a local woman earlier in July.
Local authorities are angry the trio have been flown back to Australia before an investigation, and a peak Australian lawyers body fears there's been a cover up.
A spokesman for Prime Minister Peter O'Neill said the incidents were not a reflection of the island's safety.
