Jakarta: The chief executive of Cambodia's oldest independent news outlet, Marcus Holmes, says the Phnom Penh Post is not in danger of closing down, despite reports to the contrary.

Last September, rival paper the Cambodia Daily was shut by the Cambodian government amid a broader crack down by Prime Minister Hun Sen on opposition politicians and the free press.

The president of the Cambodian National Rescue Party, Kem Sokha, was arrested and other opposition figures have been thrown in jail or are in hiding.

The Daily had a $US6.3 million ($A8.2 million) tax bill slapped on it and went down in a blaze of glory, declaring on its final front page that Cambodia was making a "Descent Into Outright Dictatorship".

Talk has now turned in Phnom Penh to the future of the Post, which is widely read and publishes criticism of the strongman leader's regime in both English and Khmer.