The 28-year-old man was arrested in the city on Tuesday morning (September 23). and remains in custody. A spokesperson for West Mercia Police said: "The man is helping us with enquiries following a report of an incident outside Marks and Spencer on the High Street at around 8.30am, where a man was acting suspiciously. "We would like to speak to a woman in her 20s who told a security guard she was being followed by a man, as it's believed she could be a key witness." The woman has been asked to contact PC Daniel Binner via email: daniel.binner1@westmercia.police.uk.