A 21-year-old woman died Sunday from injuries she suffered after the motorcycle she was riding on crashed.

Chelsey D. Nielson, of Elk River, was injured on Saturday sometime between midnight and 1 a.m., when the rear tire of the motorcycle went flat, causing the driver to lose control. The bike and both riders went down and skidded into a ditch, resulting in serious injuries to both, the State Patrol said.

The accident happened on Hwy. 4 near Paynesville in Stearns County. Jeremy D. Hoffenkamp, 28, of Atwater, Minn., was hospitalized in critical condition, the State Patrol said.

Nielson, who suffered multiple head injuries, was pronounced dead shortly after 7 p.m. Sunday at Hennepin County Medical Center, according to the county medical examiner's office.