Detectives are investigating a series of blackmail offences where Chinese people were forced to withdraw huge amounts from cash machines in north London.
Since January, horrified victims have been approached around the Chapel Market and Liverpool Road area of Islington by suspects who asked if they knew a doctor.
They were told that if they refused to take out large quantities of money from nearby ATMs their family members would “mysteriously” get hurt in the coming days.
The Metropolitan Police released images of women they want to identify and speak with.
Detective Constable Paulo Roberts, leading the investigation, said: “These incidents left the victims incredibly shaken and we know it has caused huge concern within the Chinese community.
“I want to assure local people that extensive enquiries have been conducted, and our work is still ongoing.
“The images we have are good quality and I am sure there is someone out there who will recognise these individuals.”