A 9-year-old girl accidentally shot and killed a shooting instructor with an automatic Uzi in White Hills, Arizona, authorities said in a statement Tuesday.

The girl, who was unidentified, shot 39-year-old instructor Charles Vacca in the head on Monday, Mohave County Sherriff's deputies said in a release. She was learning how to use the weapon. The shooting took place around 10 a.m. local time at Last Stop, a business with a shooting range that's located in the ghost town. The girl, who police did not identify, was accompanied by her parents.

A Fox 10 Phoenix YouTube video shows Vacca positioning the girl, who is wearing pink shorts and pink earmuffs, during part of the lesson before he was shot. The video cuts off before the fatal shot, though the gun appears to be lurching out of the girl's control.

When the girl pulled the Uzi's trigger, the recoil sent the gun over her head and shot Vacca, who was standing next to her, investigators determined. The man, from Lake Havasu City, was airlifted to a medical center in Las Vegas, but he was pronounced dead Monday night.

Most shooting ranges have strict safety rules when teaching children to shoot, and instructors tend to keep their hands on high-powered weapons that children are firing, Ronald Scott, a Phoenix-based firearms safety expert, told the Associated Press. "You can't give a 9-year-old an Uzi and expect her to control it," Scott said.

Some Twitter users were stunned by the news, and commented on the appropriateness of letting a child shoot an Uzi.

We've reached a point w/guns in America where the headlines are dystopian. 9yo kills instructor w/Uzi? http://t.co/aBwJekgWys via @semayer — Alicia Mayer (@RealAliciaMayer) August 26, 2014

Chas Vacca, Shooting Instructor, Fatally Shot By 9-Year-Old Student. Maybe 9 is too young for Uzi shooting lessons? http://t.co/J6XI5PFKBa — Mark C. Crowley (@MarkCCrowley) August 26, 2014