UPDATE: A Monday night fire at the Norfolk Southern Railyard at Scruggs and E. 3rd Street required four companies from the Chattanooga Fire Department.

When firefighters arrived on the scene, they found a large stack of railroad ties on fire next to the main rail line. Firetrucks were moved to a lot behind the Alexian Brothers facility on 3rd Street, which gave them better access to the fire.

Three mainline railways had to be shut down for firefighter safety, according to CFD spokeman Captain Chuck Hartung.

Once the fire was brought under control, Norfolk Southern called for a backhoe to separate the pile and finish extinguishing the smoldering ties.

PREVIOUS STORY: Chattanooga firefighters responded to a fire at a railroad yard on Scruggs Street Monday night.

Dispatchers were told railroad ties caught fire.

Our crews on the scene found firefighters working to extinguish a pile of logs near the railroad.

It's not clear what caused the flames.