Twenty-one vehicles had tires punctured overnight in Dartmouth.
Police say the vandals caused damage to vehicles in the area of Albro Lake Road, Slayter Street and Sheridan Street.
In a news release, police said the majority of the vehicles had only one tire damaged.
There was no witness to the events. Police suspect the damage was caused by the same person or group of people.
They're asking anyone with information to contact police or Crime Stoppers.