A 13-month-old girl was seriously injured Wednesday when an SUV backed over her in the driveway of her Hamilton home, Loudoun County Sheriff’s officials said.

The toddler’s mother and a friend were talking outside of the home in the 1700 block of Twinoaks Place about 2:30 p.m., but neither adult realized the girl was outside, said Liz Mills, a Sheriff’s department spokeswoman. The family friend struck the child in the driveway in the SUV.

Authorities flew the child to Inova Fairfax hospital, Mills said.

Clarence Williams is the night police reporter for The Washington Post and has spent the better part of 13 years standing next to crime scene tape, riding in police cars or waking officials in the middle of night to gather information about breaking news in and around Washington.