12-year old Oklahoma boy gets family gun and shoots 11-year old sister

Near Shawnee, Oklahoma, a 12-year old boy and his 11-year old sister were playing with their family's unsecured, loaded handgun when the boy unintentionally shot his sister in the stomach.

From an article:

Pottawatomie County Sheriff's Office tells KRMG the shooting happened at a Twin Lakes home near Shawnee. 

The girl and her 12-year-old brother were playing with a handgun when the brother accidentally shot his sister in the stomach.  

She was flown to a hospital in Oklahoma City and her condition is unknown.  Sheriff's office said the brother wasn't harmed during the shooting. 

According to another article, the girl was in critical condition and entering surgery.  Their parents were not home at the time of the shooting, but rather driving home from work.  The gun was a small-caliber handgun, and the boy did not know it was loaded.

Every gun in the hands of a child must first pass through the hands of an adult.