One person was killed following a three-vehicle accident in Winnebago County. The accident happened Tuesday evening around 10:30 p.m. on Highway 41 Southbound, near Jacobson Road, in the Town of Menasha. Winnebago County Sheriffs Lt. Gordon Ledioyt says a slow moving vehicle from Minnesota was traveling in the far right lane of traffic when it was rear-ended by another vehicle traveling at highway speed. The second vehicle careened off the highway and onto to the shoulder of the road. Ledioyt says a motorcycle then came upon the two vehicles, could not avoid them for unknown reasons, and struck the Minnesota vehicle. The operator of the motorcycle, 57-year-old Terrence Siems of Oshkosh, was taken to Theda Clark Medical Center in Neenah where he was pronounced dead. The investigation continues and Ledioyt says alcohol does not appear to be a factor. No citations have been issued and no arrests have been made.