OAKLAND — The Alameda County Coroner’s Office has confirmed that all 36 victims of Oakland’s Ghost Ship warehouse fire died of smoke inhalation.

The coroner’s Sgt. Howard Baron of the Alameda County Sheriff’s Office confirmed the information Friday but said the cause of death of the 36 victims has been known for weeks. No report from the coroner’s office was released Friday, he said.

The warehouse fire broke out on Dec. 2, 2016, on 31st Avenue in Oakland’s Fruitvale district around 11:32 p.m. It was the deadliest fire in the U.S. since 2003, killing 36 victims. The warehouse was known as a place for artists to display and perform their work.

One of the last victims to make it out of the blaze, Sam Maxwell, said he suffered serious smoke inhalation and was in a medically induced coma for nearly five weeks.