Hackensack firefighters said they had the two-alarm, fifth-floor blaze at The Newport Apartments on Prospect Street under control within a half hour after it ignited at 5:30 p.m. Thursday.
No serious injuries were reported, they said. Units above and below sustained some damage.
Mutual aid fire companies from Englewood and Teaneck assisted. A Hackensack University Medical Center ambulance also was on standby.
The Bergen County Prosecutor's Arson Investigations Unit was notified.
Click here to follow Daily Voice Hackensack and receive free news updates.