A large fire broke out at a commercial building in Watertown Saturday, officials say.

It happened at Koster Keunen on Echo Lake Road around 8:30 p.m.

Firefighters found heavy fire outside of the building which then spread to the inside.

Crews from Watertown and surrounding towns spent more than five hours putting out the fire.

Officials say large pallets and containers of wax caught fire. They say the fire was challenging for first responders due to access and large volume of fire.

According to its website, Koster Keunen is the world's leader in natural waxes and wax technology.