Police have been told that two males behaving suspiciously had been seen in the area about 12.30am on Sunday morning, around the time the garage was believed to have been vandalised.
Police have since identified a number of locations where the premises and vehicles had also been vandalised with similar messages in the same paint colours. .
Anyone who may have seen two suspicious males in the Ngunnawal area early Sunday morning should call 1800 333000, or act.crimestoppers.com.au. Information can be provided anonymously.