Australia has expressed serious concerns to the Cambodian government about the country's national election.
Foreign Minister Julie Bishop is worried political parties, civil society groups and the media were blocked from operating freely during the poll, reversing more than 25 years of progress towards democracy in Cambodia.
The election saw the dissolution of the main opposition Cambodia National Rescue Party, the detention of its leader Kem Sokha, and the banning of its parliamentarians and officials from politics for five years.
Cambodian prime minister Hun Sen also threatened to unleash civil war if his bid to extend his 33-year rule was rejected.
"Australia is disappointed that Cambodian people have been unable to freely choose their representatives," Ms Bishop said in a statement on Monday.
"Australia will continue to urge the Cambodian government to take steps to allow free and open political debate without violence and intimidation."
Greens leader Richard Di Natale demanded the Turnbull government refuse to recognise the "anti-democratic and bogus" election result.
Senator Di Natale said it was disgraceful the government just months ago celebrated Australia's strengthened ties with Cambodia, believing it was influenced by a "dodgy" refugee deal with the Southeast Asian nation.
"It's time for the foreign minister to do more than just meekly express concerns. We must refuse to recognise the result, and call for the release of all political prisoners," he said.
"Australia should be protecting our region's democratic freedom and standing up for Australia's Cambodian community who have been threatened by Hun Sen. We should not be pandering to despots."
The minor party believes Australia must follow the United States and other countries which have implemented targeted trade and travel sanctions against Cambodia.
The Greens also want the "shameful" refugee deal abandoned.
Labor has backed the government's decision not to send Australian election monitors to Cambodia, believing they would have given legitimacy to the "sham" poll.
Opposition frontbencher Mark Dreyfus called on Cambodia to restore a viable opposition and free press, and to immediately release Kem Sohka from custody.
"We urge the Cambodian government to allow its citizens to exercise their democratic rights," Mr Dreyfus said.
