An elderly woman and her six grandchildren were found passing out after breathing in toxic fumes emitted by a power generator inside their house in Ho Chi Minh City on Wednesday, with one of the kids passing away at the hospital later the same day.

The incident was discovered by Le Van Muoi Hai, 65, when he returned to his home in Hiep Binh Phuoc Ward, Thu Duc District at around 1:00 pm.

Hai repeatedly knocked on the locked door until one of his grandchildren eventually opened it but appeared unwell.

The man entered the residence and found that his wife, 61-year-old Tran Thi Phung, and their five other grandchildren were unconscious.

All of the victims showed signs of gas asphyxiation.

Hai sought help from his neighbors and immediately brought the victims to the hospital for emergency treatment.

Their granddaughter, eight-year-old Le Thi Bich Tr., later died at the infirmary, while another child was in a critical condition.

Phung and their four other grandkids, aged three to eleven, have regained consciousness and are now in stable conditions.

According to Hai, the family had failed to pay their power bills for several months and instead was using a power generator to supply electricity in the house.

Police officers have probed the scene and examined the device to assist their investigation.

In late April 2018, a 27-year-old man was taken to a hospital in a critical condition while his wife and their four-year-old son died from carbon monoxide poisoning in the southern province of Binh Duong.

The power was cut in their neighborhood that day and the family was running a power generator at their home.

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