Cambodian authorities have arrested five human rights workers on accusations they helped cover up a woman's affair with the deputy leader of the opposition Cambodia National Rescue Party. The action is the latest in a series by Prime Minister Hun Sen's government putting legal pressure on its critics and political opponents.

Anti-Corruption Unit director Om Yentieng told reporters Friday that four ADHOC officials and a National Election Committee member who formerly worked at the organization were detained on charges related to corruption.

He did not elaborate, but the five were among suspects questioned by his office this week over allegations they had sought to convince a woman to deny having had an affair with CNRP deputy leader Kem Sokha. She denied having an affair before later asserting she did.