UPDATE: The Ottawa County Sheriff's Office reports Michelle Olszewski was located with her youngest son, Cash, in St. Louis early Saturday.

Deputies say her two older children, 14-year-old Hadley, and 10-year-old Christopher, remained missing but were also located Saturday evening in St. Louis.

The family is reported to be safe.

Michigan authorities will continue to investigate in coordination with Missouri authorities.

ORIGINAL: MISHAWAKA, Ind. -- The Ottawa County Sheriff's Office is seeking the public's help in finding a missing woman and her three children. They are currently believed to be in the Mishawaka area. Anyone who believes they have seen her, or her children are being asked to call 911.