Ngurah Rai Immigration Office has detained 28 foreign nationals suspected of involvement in an alleged investment fraud operation based in a residential area in Ungasan, Badung Regency, Bali. RRI.CO.ID, Jakarta - Ngurah Rai Immigration Office has detained 28 foreign nationals suspected of involvement in an alleged investment fraud operation based in a residential area in Ungasan, Badung Regency, Bali.