The SCBA that a Tulsa firefighter was wearing when he collapsed while battling a suspicious house fire is being examined.
The hose that locks the mask into place is the focus of the investigation, Tulsa Fire Department Spokesman Stan May told KOTV.
Firefighter James O'Neal was unresponsive when he was rescued from the house on Saturday. He was revived at the scene by paramedics.
On Tuesday, he spoke to his family but remained in intensive care.
"The mask is designed to withstand about 1200 or 1300 degrees," May told reporters. "We're trying to see if maybe one of the locks broke or why it came loose or if that's even the piece that came loose..."
But, he added that it may have gotten snagged on something or that possibly O'Neal pulled it off and was unable to get it back on.
A reward of $3,500 is being offered for information leading to the arrest of the person responsible for setting the fire.