Police in southern Vietnam on Monday arrested three men as part of an investigation into the counterfeiting of quality assurance certificates for automobiles.
Nguyen Van Hung, 47, Le Van Mien, 51 and Nguyen Van Nam, 34 were detained in Ho Chi Minh City after delivering thousands of the fake certificates to customers.
The police began the investigation after some of the certificates were discovered in the Central Highlands province of Gia Lai early this year.
Their accomplice Pham Quoc Dong, 38, was caught in Gia Lai in April.
The ring started in late 2008 when Dong advertised to bus drivers and owners that he could bribe officials at the quality assurance office to get the certificates quickly.
Customers believed that certificates were real and paid him, he told police.
Then he asked Nam to make the certificates for VND1.5 million a piece. Nam outsourced the job to Mien and paid him VND1.2 million. The payment was down to VND700,000 when Mien asked Hung to do it.
Hundreds of fake quarantine certificates and tools for making them were found at Hung's place in HCMC.
A HCMC police officer said "Recently, many serious traffic accidents have occurred due to poor vehicle safety."
"Only vehicles that do not meet safety standards try to buy the stamps." he added.