Philadelphia firefighter killed in building collapse, 5 rescued in 'catastrophic accident'

A Philadelphia firefighter was killed when a building collapsed early Saturday morning, fire department officials said.

Paul Conner is a Fox News Digital senior editor. Email story tips to paul.conner@fox.com.

Firefighters were first dispatched at 1:53 a.m. for a "routine" fire. The incident progressed to an "all hands in service" call, before the blaze was extinguished.

At 3:24 a.m., there was a "total collapse" of the building, trapping the six responders who were surveying the damage and helping displaced residents.