Two children who appeared to have frozen to death while living in a van in Detroit last month actually died of carbon monoxide poisoning, officials said.

The Wayne County Medical Examiner's Office released the official cause of death of two children who died while sleeping in a van with family in Detroit.

Autopsies show two Detroit children who died in a van in below-freezing temperatures were victims of carbon monoxide, not exposure to cold weather

The cause of death of two young children who were sleeping in their family's van was revealed to be carbon monoxide poisoning and not exposure to the cold as Detroit authorities first thought.

Feb. 10, Tateona Williams and her family, who were experiencing homelessness, were inside their van at Detroit's Greektown Casino. Inside were her five children. Williams first discovered one of her kids was not breathing that morning.

Autopsy results released Wednesday reveal Darnell Currie Jr. and his sister, A'Millah, died of carbon monoxide poisoning, not hypothermia.

DETROIT, MI – The Wayne County Medical Examiner’s Office determined the two children found not breathing in a minivan outside Detroit’s Greektown Casino died of carbon monoxide poisoning, Fox 2 Detroit reports. Police originally thought the two children, Darnell Currie Jr., 9, and A’millah Currie, 2, froze to death on Feb. 10.

Two children living in a van were initially suspected to have died from hypothermia. An autopsy reveals death by carbon monoxide poisoning.

The cause of death of two young children who were sleeping in their family's van was revealed to be carbon monoxide poisoning and not exposure to the cold as Detroit authorities first thought.

The two children who were believed to have frozen to death in their family vehicle were killed by carbon monoxide poisoning, according to the Wayne County Medical Examiner's Office.

The Medical Examiner said carbon monoxide poisoning is what led to the tragic death of two children in a van at a Detroit casino parking garage last month.