In January, Taiwan prosecutors said they found evidence that China's Taiwan Affairs Office promised to pay a Taiwanese politician $500,000 to run a website publishing articles promoting unification.
US cybermonitor says National Election Committee, Senate and ministries were breached.
The CNRP was banned by the Supreme Court late last year and will not be able to field any candidates to contest seats in the July 29 election.
The visit aims to determine whether the government’s crackdown against the opposition and civil society should prompt Cambodia’s expulsion from the Everything But Arms scheme.
At each event, the premier’s team handed out about $5 to each attendee, making the total sum in the region of $3.5 million, according to the government’s figures.
Brad Adams told VOA the report was based purely on historical facts, which the Cambodian authorities had not challenged with any counter-evidence, adding that Hun Sen should produce evidence to support his claim that his generals were “clean”.
Hun Sen has said that people posting online messages online saying they will not vote in the election on July 29 could face legal action.
Representatives of major mobile phone operators covered by the order could not be reached for comment.
Ouk Phalla was one of the country’s most prominent Apsara dancers.
Two candidates in next month’s election amongst those targeted in new report.
The hearing, held on June 14, invited experts to testify as to the health of democratic regimes seen as “backsliding” towards authoritarianism.
Young Cambodians are eager for change and represent a large voting demographic, but their growing activism can also put youths at risk.