Jakarta. The Immigration and Corrections Ministry is investigating the sponsors and guarantors linked to 320 foreign nationals arrested over the weekend for their alleged involvement in an online gambling operation at Hayam Wuruk Plaza Tower in Jakarta.

Arief Eka Riyanto, head of immigration supervision, said the investigation aims to identify the individuals or entities responsible for facilitating the foreigners’ entry and stay in Indonesia.

“We will trace the sponsors or guarantors of these foreign nationals so we can determine how they entered and remained in Indonesia,” Arief said in Jakarta on Sunday. “We are also deepening the investigation into whether the suspects committed immigration-related crimes.”

The foreign nationals are currently being held at immigration detention facilities and temporary detention rooms in West Jakarta and South Jakarta while police continue their investigation, Arief said.

According to police data, the detainees include 228 Vietnamese nationals, 57 Chinese nationals, 13 Myanmar nationals, 11 Laotians, five Thais, three Malaysians, and three Cambodians.

Authorities have also detained one Indonesian citizen in connection with the same case.

The investigation forms part of a broader crackdown by Indonesian authorities on suspected transnational online gambling and cybercrime networks operating in the country.