13-year-old killed, 18-year-old seriously injured in dirt bike crash

LINCOLN COUNTY, S.D. (Dakota News Now/Gray News) - A 13-year-old boy was killed and an 18-year-old was seriously injured Saturday night in a crash, authorities said.The South Dakota Department of Public Safety said the crash occurred just before 10 p.m. near 486th Avenue and 290th Street.Both riders were from Hudson, South Dakota.The 13-year-old died from his injuries. The 18-year-old rider was taken to a hospital with serious, non-life-threatening injuries.Investigators determined the 13-year-old was wearing a helmet, while the 18-year-old was not.The investigation is ongoing.