A Vietnamese woman and her husband have been arrested in Hanoi after they had allegedly physically abused the wife's three-year-old daughter, causing the child to die from multiple injuries.

Nguyen Minh Tuan, 31, is the third husband of Nguyen Thi Lan Anh, 29. They both reside in Hanoi.

According to police in the capital city, Anh and Tuan are drug addicts.

Anh has a three-year-old daughter, M.M., with her second husband. The child had lived separately from her, being brought up by Anh's 51-year-old mother.

On March 5, Anh brought M.M. to live with her at her house in Dong Da District.

According to police investigation, Tuan and Anh stopped feeding the child on March 29.

Both were allegedly involved in torturing the three-year-old by forcing her to kneel in a washtub, poking her hands with needles, and hitting her head and face.

At 8:00 am on March 30, Anh noticed that her daughter was losing consciousness, unable to drink milk, and could not be resuscitated with cardiopulmonary resuscitation (CPR).

The mother then hailed a cab to take M.M. to Hanoi Medical University Hospital in the capital for emergency treatment.

Doctors at the infirmary in Dong Da District received the toddler already dead. Noticing wounds all over her body, the doctors alerted police officers.

Tuan and Anh were arrested later on the same day. Police officers also found and confiscated narcotics from their tenanted residence in Dong Da District.

On April 2, the investigative police agency under Hanoi's police bureau launched legal proceedings into the case.

The municipal police on Friday afternoon said Tuan and Anh would be detained for up to four months while an investigation is launched into their charges of "murder" and "illegal possession of narcotics."

At the police station, the two suspects admitted that they had beaten M.M. seven times on March 29 alone, ultimately resulting in her death.

According to the investigative police agency, the autopsy results showed that M.M. had withstood traumatic brain injury, tooth fractures, and hyperemia prior to her death.

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