A woman is being sought after a staff member was threatened with a needle in Next at the Capitol Centre.
South Ribble Police have released a CCTV picture of a woman they wish to speak to.
A number of thefts have taken place at the clothes store at the shopping park in recent weeks.
During the most recent incident, on Wednesday (9 May), a woman entered the store, selected various items, and attempted to leave without making payment.
Police say a staff member tried to detained her but he was kicked in the stomach and threatened with a hypodermic needle.
The woman then made off towards the Yew Tree pub in London Way.
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A policespokesman said: “We appreciate that the quality of the still images are poor, however we are confident that somebody will be able to recognise the suspect in the CCTV.”
If you recognise her and/or have any information please e-mail 5594@lancashire.pnn.police.uk quoting log reference number LC-20180509-1162.