Three vehicles in Bicester were broken into on Tuesday night.
A white van, a Peugeot 407 estate and a Toyota Land Cruiser were all parked outside houses when the thefts took place.
The van, in Lyneham Road, had one of its doors forced and power tools of an unknown value taken.
A window of the Peugeot, in Merlin Way, was smashed and a laptop stolen.
The back window of the Toyota, in Hawksmead, was broken and an attempt made to take its radio.
Pc Richie Iwanoff said: "All three incidents happened overnight. We do not have specific times but we are appealing to any witnesses who may have information that can help us find who is responsible."
Anyone with information should call police on 08458 505505 or Crimestoppers on 0800 555111.
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