The Graff Diamonds’ London store located at Mayfair area was robbed of numerous jewellery items last week. There were two robbers who approached the store in a London taxi but fled after the robbery in an abandoned blue BMW, reports say. %% The two robbers threatened the staff at gun point when taking the jewellery and took a woman hostage. The woman is believed to be a member of store staff, reports say. She escaped unharmed. The robbers continued to fire shots in the ground during the event, until they escaped into a second car, a silver Mercedes. This is the second time that the London Graff Diamonds store has been attacked, since 2003.