A minibus was set on fire at a farm on Friday.
A crew from March was called to the fire at Creek Fen, March, at 7.45am.
Multiple seats were on fire inside two minibuses, which were housed near other vehicles.
The crew returned to their station by 9.55am.
Anyone with information should call police on 101 or Crimestoppers anonymously on 0800 555111.
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