Investigators say the fire at an Oakland warehouse that claimed 36 lives progressed rapidly, trapping people on second floor.
Jill Snyder is an agent with the Bureau of Alcohol, Tobacco, Firearms and Explosives. She says people on the second floor did not know there was a fire on the first floor until it was well developed.
Snyder also dispelled reports the ATF had determined a cause.
"There's been a lot of misinformation lately from the media circulating regarding that the refrigerator was the cause of the fire," says Snyder. "This is not accurate. The refrigerator is still being examined but has not been determined to be the cause of the fire."
The Ghostship fire is the deadliest blaze at a single site since the Station night club fire in Rhode Island in 2003 in which 100 people died.