Police are continuing to question six people in London suspected of involvement in a money laundering ring.
Officers believe the shop in Mayfair was used to "clean" millions of pounds obtained illegally through false companies, credit cards and fraud.
Members of the public who pawned items at the shop in good faith are thought to have lost goods and money.
A 29-year-old woman was arrested in Mayfair and others were held in raids in Knightsbridge and south London.
Jewellery seized
Police have seized the pawnbroker's shop and a quantity of jewellery which will be compared to databases to establish whether any of it is stolen.
A 35-year-old man believed to be the group's ringleader was held on Park Street, Mayfair, along with a 34-year-old woman while a 66-year-old woman was arrested in Knightsbridge.
A 29-year-old woman and a 27-year-old man were both arrested in Battersea.
The six were arrested on suspicion of money laundering and were taken to a central London police station for questioning.
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