
The arrests followed a month-long investigation by authorities in north-western province of Battambang, The Cambodia Daily reported.
The haul was in denominations of 100 dollars, seized after a police officer went undercover as a currency trader.
The report quoted a provincial police official as saying that one of the suspects, 51-year-old Chamrat Vongsa, commands the Thai military's Company 522, stationed along the Thai-Cambodia border.