Authorities believe that a man, a woman and two twin boys who died in a fatal fire in Harlingen were killed from smoke inhalation.
The fire took place during the early morning hours of Sunday, Nov. 21st at a trailer park off Eye Street.
Investigators reported that the cause of the fire was accidental but have not released the names of the victims.
Preliminary autopsy results released on Monday show that the four died from smoke inhalation and showed signs of carbon monoxide poisoning.
Full toxicology results remain pending in the case.
The Heavenly Grace Memorial Park in La Feria has offered to hold a free funeral service and a burial or cremation for the four victims but their bodies remain in the morgue.