MINNEAPOLIS (WCCO) — A 15-year-old girl is in critical condition after an ATV crash Thursday in central Minnesota.

The Chisago County Sheriff’s Office says the crash happened shortly before 10 a.m. in Shafer Township. The teenager, who lives nearby, was driving the ATV alone.

Bystanders helped the girl until paramedics arrived. A medical helicopter brought the teenager to a local hospital for treatment.

The cause of the crash is under investigation.