Five burglaries have occurred in the borough during daytime hours, when residents were not at home.
Authorities said homeowners should be sure to lock doors and windows and secure valuable items in a secure place, if possible.
Any suspicious persons or activity should be reported immediately to the Highland Park Police Department at (732) 572-3800.
Crime Stoppers of Middlesex County Inc. is offering cash rewards for information leading to the arrest of a suspect.
Callers may contact Crime Stoppers anonymously at 1-800-939-9600, or through the Crime Stoppers website at middlesextips.com.