An Arizona freight train went up in flames after derailing on a century-old bridge Wednesday — with chunks of the span collapsing amid a fireball that could be seen for miles, according to reports.

“It looks like a scene from hell, truly. A scene from hell,” witness Camille Kimball told Arizona’s Family of the carnage on a bridge over Tempe Town Lake.

“The flames are intense and the sky is filled with black smoke.”

The fire reportedly started shortly after 6 a.m., with footage showing the train almost completely engulfed across the full length of the bridge — but amazingly no reports of any serious injuries, officials said.

One section of the Salt River Union Pacific Bridge — which was built in 1912 — had completely collapsed just on the side of the lake, with some of the train cars detached and on the ground.

“I turned around to look and got the fright of my life,” according to, Kimball, who told the outlet she heard a deafening noise as she cycled past.

Another onlooker, Bruce Haffner, described the scene as “unbelievable.”

“It’s such a catastrophe,” he said.

Officials told 12 News they were still investigating whether the bridge collapse caused the derailment and fire or was a result of it.

The Union Pacific train was mostly carrying lumber, some of which could be seen in the lake, officials said.

However, some of the tanker cars had hazardous materials warning signs — but nobody knew exactly what was being carried, hampering the emergency operation, officials told local media.

A fire official told Arizona’s Family that almost 100 firefighters had to take a a “slow and methodical” and “worst-case approach” to the potentially hazardous material.

Tim McMahan, a spokesman for Union Pacific Railroad, said none of the crew members on board the train were hurt, but there was one report of someone nearby suffering smoke inhalation.

The company intends to launch a probe into what led to the derailment, he said.

With Post wires