(Griswold, Iowa) – One person was injured during a semi tractor-trailer rollover accident late this (Thursday) morning, near Griswold. According to dispatch reports, the accident happened at around 11:46-a.m. on 600th Street, just north of Tucson Road. The driver was initially said to be unconscious, but then was alert before passing out again. Griswold Fire and Rescue was dispatched to the scene. Cass County Sheriff’s Deputies also were on the scene.

Authorities says an air ambulance (helicopter) would not be needed. Additional information was not immediately available.