A Benford roller, track dumper and micro digger were stolen from a building site opposite St Augustines Road, Wisbech on Wednesday evening.
The incident is believed to have occurred between 00:30am and 01:30am.
It is suspected that the items would have been transported on either a low loader or by a number of smaller vehicles pulling trailers.
Police are keen to speak to anyone who was around the Wisbech area between those times, or if they might have witnessed the items being removed from the building site.
Anyone with information, should contact Cambridgeshire Constabulary on 101 or Crimestoppers, anonymously, on 0800 555 111.
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