Five homes in Cleveleys were targeted by burglars in one weekend.
Valuables including jewellery, and Apple Macbook Air computer, cash and hair straighteners were stolen during the raids.
The houses were targeted in the early evening of Saturday and Sunday on Rowland Lane, Norfolk Avenue, Rutland Avenue, Henley Avenue and Ormont Avenue.
PC Rachel Bibby, said: “On each occasion the offender appears to have targeted the rear of the property.
“We would ask people to remain vigilant and make sure they lock their doors and windows.
“If anybody noticed anyone acting suspiciously or has any information about any these burglaries they should call Police on 101.”