The boys were among a group of 20 who were rounded up in Fort Lee after neighbors complained about a loud house party in March. The van was parked at police headquarters and the teens said they were "stranded" for more than 14 hours with no food, water or cellphones.
The boys said they were released after an officer heard them making noise.
Mayor Mark Sokolich told The Record newspaper Police Chief Thomas Ripoli determined the incident was "human error."
The officers were reprimanded through demotion, suspension without pay or a combination of the two.
Information from: The Record