LAS VEGAS (AP) _ Five youths working a clean-up crew along a busy highway were killed Sunday afternoon when a speeding van raced off the interstate and slammed into them.

A sixth was critically injured.

The six youths were among a group of 45 juvenile offenders, ages 14 through 17, who had been sentenced to work for the Clark County Youth Services Department.

The victims were hit by a white Ford minivan driving northbound when it ran off Interstate 15 near the Las Vegas Motor Speedway, just north of the downtown area, said Nevada Highway Patrol Sgt. Steve Cabrales.

The 20-year-old driver was transported to University Medical Center for minor injuries, then she was taken into custody and jailed for investigation of driving under the influence involving controlled substances and felony reckless driving.