They say a 20-year-old man was in a ravine in Busti when he mixed three six-pound boxes of Tannerite together and shot it with a rifle, which caused the explosion.
Tannerite is used by shooting clubs to provide explosions for their participants in large-scale weaponry demonstrations or other events. The recommended amount to use during target practice is half a pound.
No charges have been filed against the 20-year-old.
This YouTube video shows what a 12-pound Tannerite explosion looks like: