Police Scotland is appealing for information following a series of vandalisms in Nairn, including at the Courthouse Tower construction site on the High Street.
An adjoining residential building and also a small building close to Nairn Harbour on Harbour Street were also vandalised.
This incidents occurred at around 1.10am on Thursday, July 18.
Constable Kirsty MacDonald said "We are appealing for witnesses who may have seen a small silver car on both Harbour Street and the High Street in Nairn with two male occupants.
"The men were dressed in dark clothing but one of the men changed into white overall-style trousers on the High Street.
"The individuals responsible have gone to great lengths to scale scaffolding in order to deface the Courthouse Tower. This is highly dangerous and could have resulted in a serious injury.
"They scaled the scaffolding to such a height that specialist contractors had to be employed to cover the graffiti.
"If anyone witnessed this or has any information, please report this to Police on 101 using reference number NM/1421/19. You can also contact Crimestoppers on 0800 555 111."
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