Northfield Township police are warning residents to always make sure their car doors are locked following a series of recent thefts from vehicles.

Police say the car break-ins have occurred throughout the township, although a total number was not available today.

In addition to locking vehicles, police say it's important that people remove the valuables inside, such as laptops, cameras, purses, briefcases, GPS units and shopping bags or packages.

"Most thefts are crimes of opportunity, and you will limit the opportunity if the thief does not view anything to take," police said in a release.