A 23-year-old man was taken into custody Tuesday for allegedly throwing concentrated acid at and seriously injuring five members of his former employer's family in the northern province of Nam Dinh.
Le Minh Dai, 38, had sacked Dang Van Hai from his electrical shop in June after finding him trying to flirt with his 11-year-old daughter.
Hai then repeatedly beseeched Dai to take him back, but the latter refused and instead recommended him to another shop.
On August 3 when Dai and his family were having a dinner, Hai entered their house through the shop in front and threw acid on them.
Hearing their cries for help, neighbors rushed in, caught Hai and took the victims to hospital.
According to the Vietnam National Institute of Burns, Le Quynh Trang, Dai's eldest daughter and the one whom Hai was interested in, is the most seriously injured with 44 percent burns.
Dai is likely to lose one eye, while his 35-year-old wife, six-year-old daughter, and 61-year-old mother have 15-25 percent burns.
The police have taken Hai in.
Speaking to Thanh Nien, Senior Lieutenant-Colonel Do Nguyen Khoa, chief of the Nam Dinh criminal investigation division, said Hai had "carefully" prepared for the attack.
He admitted that after getting a new job last month, he had bought 10 kilograms of concentrated acid and hidden it.
On the day of the attack he carried 1.5 liters of acid in a container, and disguised himself with a mask and a pair of glasses.
While the reason for his attack was "simple," Hai had prepared for it in a "careful, sick, and savage" manner, Khoa said.
Nguyen Thi Thanh Huong, Dai's wife, told Thanh Nien that they fired Hai after Trang showed them love letters and text messages from him.
The police are investigating.
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