Two cars were set alight overnight, and Lake Macquarie Police District believe the incidents are linked.
The first occurred sometime between 5.30pm and 8pm yesterday, at which time police have been told a Hyundai i30 was found on fire at a home on Whitburn Close, Charlestown.
Neighbours and Fire and Rescue NSW assisted in extinguishing the blaze, and police were called to the scene to investigate.
While at this home, police received reports of another vehicle, a Subaru Forester, alight on Merran Avenue, Charlestown.
They were told the owner noticed his vehicle was on fire and extinguished the blaze.
He then noticed two separate small fires at the sides of his home, which were also extinguished.
Police are calling on anyone who may have CCTV or dash cam footage from around these times in the area.
Anyone with information about this incident is urged to contact Belmont Police on 4922 8899 or Crime Stoppers on 1800 333 000.
Lake Macquarie Police District Duty Officer, Chief Inspector David Matthews, said this is a timely reminder for residents to revisit their home security.
“Always try to park vehicles inside a garage where possible, never leave valuables inside your car and in plain sight, and always remember to lock the door before walking away. These may seem like simple reminders but they can help you avoid becoming a victim of crime,” Inspector Matthews said.
