Cascade County officials say a 22-year-old man who was rescued from the Missouri River near Ulm has died.

The sheriff's office tells the Great Falls Tribune ( that Ernest Gene Lamere of Great Falls died late Tuesday at a Great Falls hospital. Lt. Dave Phillips says Lamere's death is accidental and alcohol was not a factor.

Officials say Lamere had gone into the water Monday evening to help two girls, ages 14 and 18, who were in distress and then got into trouble himself.

A 21-year-old Malmstrom airman, Jake Bush, rescued the girls and then went back for Lamere, who by then had gone under water.

Bush used CPR skills he had learned during training just hours earlier until emergency responders arrived.