Seven people were killed, 10 were injured, and three families displaced in 2023 blast that caused $42 million in damages.

In a 110-page report released Tuesday, the NTSB said the explosion and fire at Building 2 of the R.M. Palmer Company, a candy manufacturer in West Reading, Pennsylvania, was fueled by natural gas.

Federal investigators say the report on the 2023 explosion at R.M. Palmer isn't just about what went wrong — it also looks to prevent it from happening again.