A 4-year-old Alaska boy was shot in the leg Saturday when his mother's handgun fell out of its holster and fired.

Alaska State Troopers say they took a call on the incident near Wasilla just before 11:30 a.m.

Medics were treating the boy when they arrived.

Troopers say the family was leaving a pickup when the woman's .357-caliber handgun fell out of its holster, struck the pavement on its hammer and fired.

The shot hit the 4-year-old just above the knee.

The bullet went through the boy's leg and lodged in a building.

The boy was transported by helicopter to Anchorage for treatment.

No one has been charged.