Dozens of people were injured in a massive traffic pileup amid snowy conditions in southern Wisconsin on Friday, which blocked Interstate 39/90 for hours, authorities said.
Wisconsin State Patrol said 85 vehicles appeared to have been involved and 21 people were taken to area hospitals to be treated for injuries not thought to be life-threatening.
State Patrol officials said snow, ice and whiteout conditions were factors in the crash.
Most of southern Wisconsin remained under a winter weather advisory Friday afternoon with more snow expected Saturday.