Saturday evening's first T.T. practice session could be under threat.
Another thirty marshals are required to reach minimum manning levels.
Traditionally, this session is problematic for the Isle of Man T.T. Marshals Association, as many people who have expressed an interest in taking on the role have yet to arrive on the island.
And there are further reports of prohibited and restricted signage being stolen from around the T.T. Course.
Guthries on the Mountain section is where signs are disappearing most often.
Police are warning of severe punishment for anyone caught.
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