On Sunday just before 4 a.m., the Kenora OPP responded to a call of a male unlawfully entering a vehicle in the Valley Drive area of the city.
The complainant confronted the subject and kept him at the scene until police arrived shortly afterwards.
A 23-year-old Kenora male was arrested and charged with trespassing by night.
The accused was held in custody pending a bail hearing.
Leaving vehicles unlocked, and valuables left in sight, place a target on your vehicle and property.
People are reminded to lock your doors and pocket your keys, keep valuables out of sight, and roll up your windows.