On Saturday 1 July at between 12 midnight and 6am, two men entered the Kingsham Quarry compound
They caused damage to the windows and tyres of the vehicles.
The men were also seen on dashcam footage searching through the cabs.
Inspector Paul Sanzen-Baker from the Neighbourhood Policing Team said: "Vehicle vandalism is a serious offence that will not be tolerated.
"We are eager to identify the perpetrators and urge anyone with information to come forward."
If you can assist the investigation, please report online or call 101, quoting reference 173 of 03/07.