A structure fire at Sellers Manufacturing on West Walnut Street caused Danville firefighters to call for additional support shortly after 5:30 p.m. Monday.

By 6 p.m., the fire was under control, but firefighters were expecting to be working at the scene for several more hours.

The fire was inside the walls of a metal building, which was going to require hours of work with manual tools to access and fully extinguish, according to firefighters at the scene.