Anyone with any information should contact Det Sgt Alan Clements via the 24-hour Police Enquiry Centre on 101.
If you don't want to speak directly to the police, you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online at crimestoppers-uk.org. No personal details are taken, information is not traced or recorded and you will not go to court.
More top news
Investigations have been launched after a man was fatally hit by a bus and a woman died after being hit by a Range Rover.
The island has beaten of stiff competition from around the UK to host next year's flagship Pride event
One man in his twenties remains in hospital. A man has been arrested