Officers from the Littlehampton area of Sussex are warning residents to be vigilant after reports that a man has been telephoning people pretending to be a police officer.
People from Fontwell, Woodgate and Walberton have reported hearing from the bogus caller who rings from a witheld number.
The imposter claims to be an officer from Chichester police and asks home owners security questions about their homes and outbuildings. During these calls he also refers to to possible faults on alarm systems.
"During the calls the man refers to himself as PC Pete Harrison or Pete Webster and tells the homeowners about potential faults on their alarm systems.
"We cannot be totally sure of the caller's motives, but it appears he may be checking how vulnerable properties are in the area and the residents who live in them.
"Please do not give out personal information over the phone. Police officers do not make calls to members of the public of this nature and you can always ring 101 and check if a local officer has been trying to get in touch with you."