By Jennifer McRae

DENVER (CBS4)– Denver firefighters rushed to a fire at a building that was under construction. The fire may have been started by welding sparks.

(credit: Denver Fire)

Crews arrived at 290 S. Leyden St. just after noon. Smoke was pouring from the attic of the building and firefighters worked aggressively to save the structure.

(credit: Denver Fire)

No one was injured in the fire. Less than an hour later, crews had the fire under control.

(credit: Denver Fire)

Investigators are working to determine the exact cause of the fire and whether the blaze was sparked during welding.

Jennifer McRae