JANESVILLE, Wis. -

A 30-year-old Janesville man was killed and three other men were injured in a single-vehicle rollover crash early Sunday morning.

The Wisconsin State Patrol said the crash happened about 2 a.m. on Interstate 39 southbound near Janesville.

The State Patrol said a Ford F350 pickup truck was on the ramp to I-39 southbound from U.S. Highway 14 eastbound and the driver was approaching the interstate from the ramp lane, where he was going to merge.

The driver, a 31-year-old Stoughton man, accelerated and the tires lost traction on the wet pavement, causing him to lose control of the vehicle, according to a Wisconsin State Patrol news release.

The pickup went sideways and down into the right ditch, rolling twice.

The front right passenger was ejected and fatally injured, the Wisconsin State Patrol said. His name is withheld pending notification of family.

The pickup went through a chain link fence and came to rest on its tires.

The State Patrol said the other three occupants in the pickup were injured and were transported by ambulance to a hospital. Authorities said those occupants had injuries that weren't considered life-threatening.

The State Patrol said none of the occupants were wearing a seat belt at the time of the crash.