By The Nation
He said 690 prisoners had 80 heartbeats per minute and 32 had 130 beats per minute, while 30 had a high level of thyroid hormone.
The minister has ordered the cause of deaths of the four prisoners to be examined from every aspect including food sanitation inside the prison.
Previously, the deaths were thought to have been a result of toxic goiter but a thyroid examination is expensive -- approximately Bt300 per prisoner -- and there are 370,000 prisoners in 146 prisons all over the country, he said.
He added that it was a failure of management that led to the deaths of the four prisoners.
A forensic team is checking if the deaths were caused by food poisoning. The results will take two weeks.
The minister warned of legal action against both food providers and the prison officials if it were a case of negligence.