A 19-year-old man from Milton Keynes has been arrested on suspicion of a sexual assault following the release of CCTV images last week.
It relates to an incident on Thursday, July 17 when a man came up behind a 19-year-old woman and sexually assaulted her while she worked at John Lewis in thecentre:mk.
He touched her inappropriately over her clothes and then walked through the store and into the main John Lewis car park at around 12.30pm.
The arrested man has been released on bail pending further enquires and will report to Milton Keynes police station on August 27.
If you have any information about the incident, contact Darryl Morvan by calling the Thames Valley Police on 101.