Thirteen Vietnamese nationals were arrested while running an online gambling operation from three hotel rooms in Pattaya in the early hours of Tuesday.
Police raided the three rooms in a hotel in Pattaya Sai 3 road in Bang Lamung district shortly after midnight.
Thirteen Vietnamese men were found inside the rooms. Police seized 25 computers, 58 mobile phones and other items used for operating online gambling.
All were taken to Pattaya City police station, where they were charged with running an online gambling operation or persuading people in a direct or indirect manner to gamble.