Police are investigating after a car was set alight in Ballywalter and a petrol bomb was thrown at another car in Newtownards.
One line of enquiry, among others, is that the incidents may be linked to an ongoing drug gangs feud in the North Down area.
The incidents were reported in the early hours of Monday morning, within five minutes of each other.
Read more: Arson attack on van in Newtownards 'linked to drugs feud'
PSNI Inspector Hanna said: "At approximately 12.55am, we received a report that a car had been set alight and destroyed in the Main Street area of Ballywalter.
"At approximately 1am, we received a second report that a petrol bomb had been thrown at a car parked in the driveway of a property in the Weavers Grange area of Newtownards.
"It is extremely fortunate that no one was injured in what can only be described as reckless attacks that could have resulted in more serious consequences.
"Both incidents are being treated as arson and officers are investigating a number of lines of enquiry in relation to the fires.
"Anyone who may have seen anyone suspicious in the area at the time of the fire or anyone with dash-cam or CCTV footage that could assist with enquiries is asked to contact police on 101 quoting reference 77 of 01/05/23."
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