Police are investigating reports of equipment being stolen and 'rifled through' up at the TT grandstand.
It comes following the constabulary receiving numerous reports of people entering workshop areas in tents up at the TT Grandstand.
Police say tyre warmers have been stolen and equipment boxes with tools and spare parts 'rifled through'.
Authorities warn this could have safety implications for riders:
Meanwhile, Sgt Reed had this message for people in the paddocks:
It comes after an Electric bike was stolen from a paddock on Tuesday night.
One weekend sailing cancelled, others at risk because of weather
Politician questions risk of Easter meningitis outbreak
Firefighters tackle flat fire down South
Weather warning for storm Dave this weekend
Roads to close for music festival this weekend
How long do mental health patients stay in Manannan Court?
Could you take over this former restaurant?
Framework of new Sea Services Agreement ready, says minister