It is believed the people captured in the footage may have seen the incident, which involved a man and a woman and took place between 22:12 and 22:17 on 20 June.
Officers would like to speak with the man involved as well as anyone else who was in the area at the time and may have seen a man acting suspiciously, or a woman in distress.
Anyone with information is asked to contact PC 90 Robinson, or PC 115 Blondel, at the Guernsey Police on 725111.
Alternatively, they can contact Crimestoppers anonymously on 0800 555111.
Pictured top: Those captured in the CCTV footage.
