Hanover Police are investigating after a serious crash early Saturday morning.
Police say they were called to a single vehicle rollover on 14th St., west of 13th Ave.
Two passengers were ejected from the vehicle.
Four occupants were taken to hospital, one passenger was later transferred to a London hospital in serious condition
They say the driver is a 21-year-old Hanover man, the passengers, all young men, range in age from 19 to 21 years old and live in Chesley and Elmwood.
Hanover Police are asking anyone with dashcam video or home surveillance video to contact them.