A gang of vandals armed with sledgehammers broke into a travellers' site in Bristol and caused thousands of pounds of damage.
Six men forced their way onto the land off South Liberty Lane, Bedminster, in the early hours of Sunday.
They smashed windows, knocked down walls and damaged plant equipment, such as mechanical diggers.
The land is being developed as a 12-pitch transit site for travellers, and had been due to open in July.
Bristol City Council spokeswoman Kate Hartas said: "People who are capable of this kind of behaviour have no right to judge Gypsies and travellers.
"We know that most people in Ashton Vale, whether or not they have concerns about the site, would join us in condemning this mindless act of criminal damage."
She said the cost of repairing the damage - expected to run into tens of thousands of pounds - would be met by the contractors and not council tax payers.
Anyone with information about the vandalism is asked to contact Avon and Somerset Police.