Hanoi police detained two men on Friday for shooting up a family home in July to recover a debt.
Nguyen Van Tung, 24, and Dao Van Tuan, 22 gave themselves up saying four of their accomplices remain at large, VnExpress reported Saturday.
Police said the gang pulled three guns on the unarmed family while they ate lunch on July 9.
Three people were injured including a pregnant women who was struck in the back by an errant bullet.
Shell casings collected from the scene indicated that hunting rifles were used in the assault.
"The distance from the shooters to the family was around 12 meters," an investigator told VnExpress.
Nguyen Van Nang, the father of the family, said the gang had come to recover money borrowed by his son.
The young man borrowed VND50 million (US$2,400) from a loan shark at an interest rate of 30 percent a month, Nang said.
A group of "ferocious" men visited Nang's house for the first time in May. Nang said he gave them VND20 million and promised the rest would follow.
Someone called his home on the morning of the shooting about "the rest of the debt;" Nang asked them for more time.
An argument ensued over the phone. Soon afterwards, bullets were flying through the home.
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