The firefighter, 25, was killed after emergency responders were called to a building in the McCully-Moiliili neighborhood of Honolulu before 8 p.m., fire officials said in a news conference Monday evening. The cause of the blaze was unclear, and officials said they were still investigating.

Honolulu's fire chief said firefighter Jeffrey Fiala, who was trapped by a roof collapse, had been with the department for less than two years.