A teenage girl was robbed at knifepoint as she made her way home in Hendon on Wednesday last week.
The 19-year-old was cycling along Brampton Grove at 12.15am when she saw a group of two men and a woman.
The woman approached the victim produced a knife and demanded "Give me your stash", before escaping with a £150 phone, £100 grey bike, and handbag which contained £5 in and various cards.
All suspects were white and aged around 20. The female mugger was 5ft 4ins, slim and wore a hooded top and a baseball cap. The first male was 5ft 10ins with cropped, fair hair and the other was 5ft 7ins.
Anyone with information should call Detective Constable Lynn Goodwin on 020 8733 4552.
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