KENOSHA, Wis. (AP) — The Kenosha County Sheriff’s Department says a woman attending the Country Thunder Wisconsin Music Festival in Twin Lakes has been seriously injured by a lightning strike.

Sheriff’s officials say it happened about 12:30 a.m. Friday at the festival’s campground. The woman was transported to Northern Illinois Medical Center for treatment.

Authorities say the woman is in her late teens or early 20s. They were working to identify her.