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A Texas man killed his wife by setting her on fire and then burned to death after the fire spread through their home in a horrific murder-suicid, according to authorities. 

The Harris County Sheriff's Office says it happened early Monday on the 6500 block of Desert Rose Ln. in Houston. Just before 2 a.m., deputies found the house in flames, and discovered the couple shortly after battling the blaze. 

The sheriff's office says both died at the scene in what they are calling a domestic incident. Two adult children at the home were being checked out by EMS but appeared to be unharmed in the incident.

 The woman who died was identified as Tuybach Ho, 58, and her husband Tien Trinh, 62.

At this time, investigators believe Trihn acted alone. They said an autopsy would confirm if Ho was attacked before the fire.

The two sons, 21 and 28, had woken up to their mother's screams and found her covered in flames in the garage, KPRC-TV reported.

The adult children tried putting out the flames but had to run outside as the flames spread.

Moments later they reportedly heard their father screaming from inside the garage. They are said to be cooperating in the investigation.

Deputies say a lighter was found nearby the father.

No other details were immediately available.