Police in Brighton have repeated their appeal for help to find a 96-year-old woman who has not been seen since Monday morning.
Nellie Herriott was last seen wearing a blue coat and black hat at 11am at a bus stop on Race Hill in the city.
Insp Jon Carter said: "Nellie is vulnerable due to her age and she also suffers from Alzheimers which can cause her to become confused. It's now been four days since she was last seen and we're very anxious to hear from anyone who thinks they may know where she is."
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