LOUISVILLE, Ky. -- Firefighters battled a fire at the WestRock Recycling plant on Industrial Boulevard.

That's just east of I-65 and just south of Fern Valley Road in the Okolona neighborhood.

Major Frankie Nalley says there have been up to 50 or 60 firefighters on the scene.

One particular challenge for them is a large number of burning bales of cardboard at the recycling plant.

Not only does this make the fire tough to control, it also produces a large amount of smoke in the area.

Firefighters are expected to work well into the night.