UPDATE: 3 Firefighters injured while battling warehouse fire in Louisville's Russell neighborhood

According to Louisville Fire Department Maj. Bobby Cooper, one of the firefighters was injured after being shocked by a down power line. The firefighter was transported to the hospital and was conscious and alert, Cooper said.

All three were taken to a local hospital for observation. No others were hurt.

Once on scene, the 2-story vacant warehouse was already engulfed in flames. The warehouse had a "large amount of content" inside but none were hazardous.