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 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.

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

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.

The two Detroit children originally believed to have frozen to death while sleeping with their family in a van at a casino parking structure last month were actually killed by carbon monoxide poisoning.

A funeral was held for two young children who died after sleeping in a cold van at a Detroit casino parking garage earlier this month.

A small pink casket rested next to a larger blue one at a Detroit church as hundreds of mourners gathered Thursday to say goodbye to two children who tragically died last week amid frigid temperatures while sheltering in a van with their mother.

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.