Police are hunting vandals who sunk a boat and released another at Peel Harbour.
A yellow and white sports boat was taken on its trailer from the boat park behind The House of Manannan sometime between 6pm on Friday and 8am on Saturday.
It was then launched from the Mill Road slip and sunk, resulting in what police described as 'considerable damage'.
A fishing boat called Oyster Catcher was also released from its mooring on the West Quay.
Anyone who witnessed the incidents is asked to contact Peel police on 842208.
TT organisers announce revised Saturday race schedule
TT campers in 'high spirits' despite rain affecting race week
Rider taken to Noble's Hospital after Senior TT red flag
Red flag stops Senior TT race