The marked Ford Transit vehicle is believed to have been targeted sometime between 15:30 hours on Wednesday 15th April and 9.30am the following day.
An officer attending an incident realised that there was a serious problem with the vehicle after spotting a large pool of fuel under the van.
The police van was then recovered by a force mechanic who established that the fuel pipe had been cut and that the rear brake pipe had been tampered with.
Inspector Guy Blackford said:
“This deliberate act could have resulted in a serious accident involving officers and members of the public.
“We were fortunate that officers spotted the damage early in their shift.”