Police in San Bruno want to inform residents about a rash of burglaries in recent weeks.
On Jan. 14 alone, four residences were discovered to have been burglarized within six hours of each other, police said.
The way the crooks work, according to police, is that they will typically knock on a door to see if anyone is home. If there is no answer, the suspects will look for an unlocked door or window to gain entry to the residence. Usually they will have an accomplice in a car nearby.
If someone does answer the door, the burglar will reportedly tell residents that they are service or sales people or claim they are looking for a friend and have the wrong address.
The burglaries have not been specific to one neighborhood and have occurred throughout San Bruno, police said.
Police would like anyone who witnesses suspicious activity to contact police by calling 911 and residents are also asked to write detailed descriptions of suspicious individuals and any vehicle they might be associated with.