The man and woman were arrested last night and remain in police custody, while enquiries continue.
Pictured: A 33-year-old man and a 41-year-old woman were arrested last night.
Describing the suspects in an appeal for witnesses, officers said: “The suspects, a man and a woman are both white and roughly the same height, approximately 5’8”. The man has light hair and was wearing a khaki T-shirt and black and white shorts. The woman was wearing a pink jacket.”
They also urged boat owners to check their vessels for signs of entry or loss of property.
Anyone with more information is urged to contact Police on 612612 or make an anonymous report via Crimestoppers online form.