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HERNDON, Va. (WUSA9) -- The Herndon Police Department needs help finding a 68-year-old woman, who has been missing since Tuesday.

Police said Helen Foust is an African-American woman and could possibly be in her vehicle. Foust has a 2012 Hyundai, silver, Virginia registration WVZ-8782.

Police added, Foust may be confused because she is believed to have dementia.

If you have information about Foust's whereabouts, please call Detective A. Diaz, Herndon Police Department, at 703-435-6846