Prime Minister Hun Sen yesterday lashed out at rumours his eldest son Hun Manet was the result of a relationship between his wife and a Vietnamese leader, blaming the opposition party for spreading the “serious insults”.

The premier addressed the rumours, which have long percolated online, while speaking to graduate students at a ceremony at Phnom Penh’s National Institute of Education.

“It is unreasonable that they post on Facebook that Hun Manet is not the son of Hun Sen and requested a DNA test,” the premier said, before alluding to legal repercussions.

The premier said he had in fact ignored a suggestion by Manet to clear the matter up with a DNA test.

He blamed the “cheap act” on the opposition Cambodia National Rescue Party, which yesterday denied any involvement in a statement.

However, yesterday evening, the premier told local media outlet Fresh News he was not sold, adding that the opposition would need to pay a “high price” to make amends.

“I do not believe the [CNRP’s] statement because it does not condemn the people who have insulted me, my wife and my children,” he said. “Therefore, they need to fix this serious insult.”