Three men and a woman from Kampong Cham accused of brutally murdering a man after beating and then forcing him to ingest poison were arrested on Sunday, a police officer said.

The suspects, Soeun Nan, 34; Soeun Mean, 24; Dim Pream, 27; and Pchong Soeung, 54, are all from Memot district, according to Chan Thol, a district crime chief.

“Police cannot conclude if the victim was forced to drink poison, but the victim vomited poison and doctors also say he was poisoned,” Thol said. He added that all four suspects are being held at Tbong Khmum district police station.

Authorities said yesterday that the victim was allegedly involved in an altercation involving the demarcation of his rubber plantation when a fight broke out that led to his death on June 15.