An elderly woman - who has been known to ride buses when she has gone missing before - has not been since since Saturday.
Edna Chibogwu was last seen at approximately 7.30pm on April 11, after leaving her home in Teviot Street.
Edna is a black woman, approximately 5ft 5inches tall with grey hair. She was last seen wearing a red and white bobble hat, red jacket with a bright multi-coloured skirt and carrying a cream coloured handbag.
Edna suffers from schizophrenia which requires regular medication.
When she has gone missing before she has been found on buses in the Bethnal Green and Fulham areas.
Anyone with information is asked to contact Tower Hamlets police on 101 quoting ref: CAD 9487/11Apr15.