It happened on Wednesday 14 February between 18:00 at 9:20 the following day.
Guernsey Police have published the following statement:
“Police are looking for any possible witnesses who have been in the area around these times and seen or heard anything suspicious.
“If you have any information regarding this incident you are asked to PC 126 Setters on 222 222 or to contact Crimestoppers anonymously on 0800 555 111.”