HONOLULU (HawaiiNewsNow) - Federal agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives are on Oahu working ...

Jeffrey Fiala left behind a wife and the four injured firefighters are expected to be released from a Honolulu hospital.

Jeffrey Fiala, 25, was part of the Honolulu Fire Department unit that responded to a three-alarm blaze at a residential building in the McCully area.

While six survivors of the Aliamanu fireworks explosion receive treatment in Arizona, some of their loved ones also made the trip to help in their recovery.

ATF agents based in Honolulu have already started the investigation, but a few dozen more are on the way from various states.