SALT LAKE CITY?A 7-year old boy found some ammunition for his father?s high-powered rifle Friday and accidentally fired at his younger brother, killing him.

The 6-year-old died within an hour at the Tooele Valley Regional Medical Center.

?It was just a tragic accident,? Tooele Police Lt. Craig Wexels said Friday.

Wexels said the 7-year-old boy picked up an unloaded .30 06 caliber hunting rifle from his father?s gun rack, found some ammunition, loaded the rifle and fired, hitting his brother in the lower neck.

The shooting happened when the father was at work and the mother was outside of the house but in the neighborhood.