The sheriff says the blast was at a home on 1040 Road and likely happened when a man was experimenting with two pounds of Tannerite, which is a binary explosive used mainly for targeting practice.

He says the incident occurred just before 4 p.m.

Deputies said the boy was airlifted to a Tulsa hospital. Another victim, a 22-year-old man, suffered leg injuries. An ambulance took him to a Fort Smith hospital.

Sheriff Lockhart says the man mixed up the Tannerite then placed it inside a stove and shot the stove with a high-powered rifle. Fragments from the exploding stove hit both victims.

Deputies arrested the man on a child abuse complaint. They also arrested a man and woman on a compliant of providing false information.

Lockhart says he called in the Oklahoma Highway Patrol Bomb Squad and Bureau of Alcohol, Tobacco and Firearms to assist with the investigation.