The investigation is focused on finding the source of more than 500 pieces of dynamite and 194 blasting caps that were found inside a metal box.

The ATF investigates origins of dynamite found at a Knoxville recycling facility after its unexpected discovery prompted evacuations.

The Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) will be conducting a follow-up investigation into the origins of the explosives that were found at a recycling business along Western Avenue and prompted an evacuation,

A box of dynamite received by a recycling center in Knoxville, Tennesee, prompted an evacuation of local residents and a lockdown as authorities tackled the find. It was 36 hours before the "high-grade commercial explosives" were declared safe by the bomb squad,