Two men, a Cambodian and a Vietnamese, were found dead in a detention room at the Immigration Police Bureau early on Wednesday.
Pol Lt-Colonel Kamolpop Dissayabutr, deputy inspector of Thung Mahamek police station, said ground-floor detention room No 14Bt, where the two men were found dead, was holding 15 foreign nationals at the time. Both bodies were found in a sleeping position on one side of the room. The Cambodian was identified only as Sakhi, 55, and the Vietnamese as Robat, 72.
The Cambodian man was transferred from Nakhon Pathom and the Vietnamese from Nakhon Si Thammarat after they were charged with unlawfully entering the country. A detainee in the same room told police that he got up in the night to use the toilet and noticed that the two were not breathing and so alerted officials. The bodies were sent for autopsy at Chulalongkorn Hospital.
Acting Immigration Police chief Pol Maj-General Surachate Hakpal said he checked with the forensic medicine department of Chulalongkorn Hospital and learned that the two had no internal or external signs of injury.
The doctor who performed the autopsy found that the two men had pneumonia, while the Vietnamese man also had heart disease and tuberculosis. The coroner believed the two died of natural causes, said Surachate.
Surachate said the Cambodian and the Vietnamese embassies had been contacted to receive the bodies to send for funeral services back home.
The immigration chief said he had also instructed officials to clean up the detention cell.