Vietnamese police have apprehended a suspect in the killing on Wednesday of three people in a family, allegedly resulting from a personal animus toward one of the victims who had opposed the suspect watching porn at her house.

Officers said on Thursday that they had arrested Tran Trong Luan, a 34-year-old man from Tan Uyen Town in Binh Duong, a province around 35km to the east of Ho Chi Minh City, the day before.

Luan is accused of killing three family members, including a grandmother, a daughter, and a grandchild, in Tan Uyen.

The suspect, who was the victims’ neighbor, would watch porn on his smartphone whenever he came to the house of Dao Thi Thu Cuc, 54, for coffee, as the place doubles as a coffee shop, according to preliminary reports.

He was told to go home by Tran Thi Quynh Nhi, Cuc’s 17-year-old daughter, each time he opened porn, leading to his animosity toward the young girl.

Luan intended to commit suicide after losing all of his money in gambling on Tuesday evening.

But the intention of killing Nhi suddenly crossed his mind so he carried three knives and a machete to the coffee shop around 0:00 on Wednesday.

He was breaking into the house through the roof when Cuc found him. He then slashed her with the machete to death before going on to murder Nhi and her niece, 8-year-old Nguyen Thi Bao Ngan.

Police officers found the weapons Luan had thrown 100 meters away from the crime scene.

The crime story unfolded when neighbors heard dogs barking continuously at 3:00 am on Wednesday but they did not check the area, thinking someone might be working at the sand strip nearby.

At 7:00 am, Cuc’s eldest adult child Tran Minh Phuong dropped by to pick up her daughter, Ngan, on the way to work when she saw the little girl lying motionless on the floor amid blood.

She shouted for help from neighbors who rushed in to see Cuc and Nhi also dead.

Police were informed of the crime shortly.

They captured Luan after a raid on Wednesday. During the raid, the suspect tried to kill himself with poison but he survived after police took him to the hospital. 

The suspect admitted to his crime at the police station.

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