Federal Alcohol, Tobacco and Firearm agents are joining the effort to find out what caused a three-alarm fire at a Lakewood furniture warehouse this week.
Grandwood Furniture was destroyed Tuesday morning when it erupted in flames. Concrete walls helped insulate the fire, causing it to incinerate nearly everything inside.
A national response team with the ATF will work with West Pierce Fire and Rescue investigators to help learn what sparked the fire.
The joint collaboration does not indicate any determination has been made about the fire.
No people were inside the warehouse at the time of the fire.