A body of the Sam Rainsy Party activist was found early Monday morning in Siemreap province.
The body of the 37 years old man was found with a rope around his neck a few hundreds meters from his house.
Local police said it is investigating and has four suspects in custody. The Sam Rainsy Party is urging human rights organizations and the local authority to investigate and to bring those responsible to justice.
Recently, a number of the SRP party activists have been murdered.