Self-exiled CNRP leader Sam Rainsy has sent a letter to Prime Minister Hun Sen condemning suggestions that his son, Hun Manet, was actually the son of a Vietnamese leader and expressing regret for such “immoral behaviour”.

Rainsy wrote the letter on behalf of the CNRP leadership after Hun Sen on Monday made a speech at a Koh Pich graduation ceremony reiterating he would not “tolerate” the accusation and would demand “huge compensation”.

“We all share in the suffering with Samdech and condemn the immoral behaviour of any people that caused suffering to the honour and dignity of Samdech and the family,” Rainsy said in the letter, which was posted on Fresh News.

In May, the CNRP terminated the membership of overseas activist Yorng Noy, who also goes by Brady Young, for making the same accusations about Hun Manet’s parentage on social media.