Crews called to second-alarm fire at Phoenix office

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PHOENIX -- Investigators are trying to determine what sparked a two-alarm fire at an office building late Thursday night.

Fire flashed

Crews were called out to the building on Thomas Road just west of 14th Street at about 11:30 p.m.

Nobody was inside at the time. Firefighters said it looked like the building was vacant.

Crews said there were flames and heavy smoke coming from the third floor when they arrived on the scene. As they were pulling their hoses and setting up their gear, even more flames broke out.

The call was upgraded to a second alarm and more personnel were called out.

"At the point that the fire flashed, it's very dangerous," explained Capt. Courtney Jenkins of the Phoenix Fire Department. "That means that pretty much the smoke and everything else just catches fire. But they had lines in place. They got water on the fire quick, knocked it down. No injuries to any firefighters. We got an all-clear on the occupancy, so [it was a] pretty good job."

The damage was mostly limited to the third floor on the northwest side of the building.

Investigators are looking into the fire.