The Coastguard is missing one of its blue magnetic lights from the North of the Island.
It's believed to have been taken from the Dhoon end of the one-way system on Sunday evening, which had been put there to make it safer for people taking part in the Parish Walk.
Coastguard teams had been controlling the top of Minorca Hill in Laxey and the light is part of a set from its rescue equipment.
They ask that whoever might have seen it to get in touch, or leave it at a location for them to collect.
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