The Papua New Guinea government has ordered an Australian lawyer to leave Canberra's Manus Island detention centre.
Sydney barrister Jay Williams was given access to more than 70 asylum seekers by PNG judge David Cannings who instituted the second inquiry after the first was stayed by government legal action.
The government has challenged Justice Canning's partiality and maintains that he cannot take part in his inquiries without a PNG qualification.
Mr Williams was told to leave on Thursday afternoon by officials who said PNG's chief migration officer obtained a court order for his removal.
The government has also moved to shut down a second probe into alleged human rights abuses at the Manus centre.