WPXI reports (http://bit.ly/StwdZt) that a teenager was arrested on arson charges related to the fire. A witness told investigators that the suspect was on the roof of the home next door, lighting towels and clothes on fire and tossing them onto the roof next door. The owner of the building said he didn't know his house was on fire until firefighters were knocking at his door.
A room on the third floor of the structure flashed, injuring several firefighters. Two of the injured firefighters were treated and released, while another is still in the hospital.
The structure was a home that had been remodeled into four apartments.
For more information and a video on the incident, go to http://bit.ly/StwdZt.
Flashovers at residential fires can prove deadly to firefighters. For training information on flashovers, consider FLASHOVER AND BACKDRAFT: A Primer, Time Out -- Out of Time: Flashover and Residential Sprinklers, FLASHOVER RISK MANAGEMENT, Trapped by Flashover : A Survivor's Journey, and FLASHOVER RISK MANAGEMENT.