An 11-year-old Riverside girl suffered a minor head wound on Tuesday after her 9-year-old brother reportedly shot her in the forehead accidentally with a BB rifle.

According to police, the BB lodged in the girl’s scalp near her hairline and the wound was bleeding heavily when a police sergeant was flagged down outside the victim’s home in the 100 block of Kimbark Road at about 4:35 p.m. by a friend of the victim.

Paramedics took the girl to Loyola University Medical Center in Maywood for treatment. She was released from the hospital later that evening, according to police.

Police subsequently learned that the two children were at home alone when the incident happened. The boy reportedly told police he did not know the pump-action BB gun was loaded when he pointed it at his sister and pulled the trigger. Riverside Police Chief Thomas Weitzel characterized the incident as an accident, though it could have been worse.

“Another inch or two and the BB would have landed in the girl’s eye socket,” Weitzel said.

The children’s mother was out running errands at the time of the incident, police said, and joined her daughter at the hospital after being reached by police.

Weitzel said police confiscated the BB gun and are continuing to investigate the incident to find out how the boy came to be in possession of the gun. In addition, police contacted the Illinois Department of Children and Family Services (DCFS), which has opened its own investigation regarding the “status of supervision at the home to see if any criminal charges will be filed in this case,” according to Weitzel.