According to the Jefferson County Sheriff’s Office, deputies were dispatched on Friday, May 27 at 6:30 a.m. to a one vehicle crash with two occupants on Twinkling Star Road, south of Highway 12 in the town of Koshkonong.

Preliminary investigation at the scene showed that the vehicle, for which no details were given, was northbound on Twinkling Star Road when it left the roadway and struck a tree. The driver and passenger were transported to a local hospital with critical injuries. The passenger was pronounced deceased at the hospital.

The sheriff’s office personnel were assisted at the scene by Whitewater Fire/EMS, Jefferson paramedic and the Jefferson County medical examiner.

The incident is still being investigated by the Jefferson County Sheriff’s Office, according to the release, but speed is a contributing factor.