A Nicollet man was seriously injured in a rollover accident on Highway 99 Monday afternoon. 21-year-old Samson Palmquist was driving a 2003 Mitsubishi Galant westbound on 99 between Nicollet and St. Peter when the vehicle left the road on a curve at around 1:15pm and rolled. Palmquist was flown to North Memorial in Robbinsdale with serious injuries. The State Patrol says he was not wearing a seatbelt at the time of the crash. His vehicle was totaled.