Three cars were damaged in incidents of arson in Antrim before 6am on Thursday.
A Citroen C2 car was destroyed and extensive damage was caused to a Subaru car in the first incident in Rathkyle at around 5.25am.
Police and firefighters attended the scene.
Just 15 minutes later a Vauxhall Vectra car was destroyed in a similar incident in Oaktree Drive.
Police said a motive for the crimes had not yet been established and appealed for information from members of the public.