Police in Hanoi on Tuesday arrested eight people who work at two gas stations for allegedly using hi-tech tricks to cheat thousands of customers.
Local authorities on Thursday last week made surprise checks at the two gas stations in Hai Ba Trung and Gia Lam Districts and discovered electronic chips attached to their pumps.
The chips would manipulate the meters and allow the station to steal around 5 percent of the gasoline that their customers paid for, authorities said.
Both of the two managers, who have been arrested, admitted to have had the chips attached for months.
The scheme at the Gia Lam station has allowed the staff to accumulate around 4.500 liters of diesel and 3.000 liters of gasoline since October, authorities said.
Investigations are continuing.
Earlier in October authorities in Ho Chi Minh City revoked the license of a gas station in District 1 for using meter tricks to cheat its customers.
Authorities started investigating the case after a Thanh Nien exposé. Its owner admitted to the violations and had to pay a fine of VND96 million, or around US$4,300.