The leaders of the gang are two Nigerian citizens, supported by six Vietnamese accomplices.
They pretended to be delivery people and inspectors, and made fake IDs to withdraw money.
Ngo Thi Hoang Ngan, Facebook user in Ho Chi Minh City said: "It is very easy to get cheated on social media. I am one of the many victims".
Many victims said that they fell into a love trap. One only got disillusioned after losing over 200 million dong to their fake online lover. After three months of investigation, HCM police arrested eight suspects of the gang and recorded their criminal testimonies. The amount of money the victims transferred to 80 ATM cards was over 10 billion dong, or 450 thousand USD.
Lieutenant Colonel Nguyen Thanh Nhan, Policeman in Ho Chi Minh City said: "All of the fraudulently attained money has been transferred to the mastermind of this crime who is still at large. Once we have found them, they will be forced to return all the stolen money to the victims".
