The suspects were detained at an office building in the Indonesian capital after police investigations linked the group to an online gambling enterprise that had allegedly operated for the past two months, officials said at a press conference.

According to Wira Satya Triputra, director of the Indonesian police force’s crime investigation unit, those arrested included 228 Vietnamese nationals, 57 Chinese citizens, 13 people from Myanmar, 11 from Laos, five from Thailand and three from Cambodia.

Wira said 275 of the detainees were being investigated under Indonesia’s criminal code provisions on gambling, which carry a maximum prison sentence of nine years. He added that most of the suspects were aware they had entered Indonesia to participate in online gambling activities primarily targeting customers outside the country.

Online gambling is prohibited in Indonesia, the world’s largest Muslim-majority nation, where authorities have stepped up enforcement efforts against digital gambling platforms and cross-border criminal syndicates amid concerns over financial fraud and illicit online operations.The arrests marked the second major enforcement operation involving foreign nationals in two days.

On Friday, Indonesian immigration authorities detained 210 foreigners on Batam island in Riau Islands province over allegations they were involved in online investment scams operating from an apartment complex near Singapore.

Interpol Indonesia official Untung Widyatmoko said there had been a recent shift in regional online gambling operations from Cambodian cities into Indonesia, reflecting changing enforcement patterns across Southeast Asia.

The latest raids underscore growing regional concern over organized cybercrime networks that have increasingly used Southeast Asian countries as operational hubs for online gambling, fraud and investment scams targeting international victims.