A spark from machinery cutting scrap aluminum started a small fire at the Alcoa facility in Riverdale, Iowa.
The fire was reported just after 8 a.m. Tuesday, July 30, 2013.
A spokesman for Alcoa said workers were cutting scrap aluminum when a spark from the cutting caught some hydraulic fluid on fire.
The fire spread to the outside of a mill, which was not running at the time of the fire.
The fire was quickly extinguished, and damage was considered to be minor.
No injuries were reported.