A 14-year-old Dyersville girl has died after being injured when the personal watercraft she was riding on as a passenger was involved in a collision on Clear Lake Saturday. A news release from the Iowa DNR states that around 5:30 p.m., two personal watercraft collided near the boat ramp at MacIntosh Woods State Park. Passengers on a nearby pontoon immediately rendered aid. The Iowa DNR water patrol and conservation officers, area fire departments and law enforcement were quickly on scene. Five individuals were on the two personal watercraft and all five were transported to Mercy-One Medical Center in Mason City. The release states 35-year-old Chelsea Maxwell and an 11-year-old female and a 12-year-old male, all from Greenwood, South Carolina, were treated and released Saturday. A 15-year-old female, from Mason City, was transferred to Mayo Clinic, in Rochester and is in serious condition. Investigation into what caused the two personal watercraft to collide is in its early stages, but officers with the Iowa DNR have ruled out alcohol or other impairments as a contributing factor. The incident remains under investigation.