The first arriving companies extinguished the second-floor blaze at The Summit on Prospect -- formerly known as the Quail Heights Apartments -- on Prospect Street shortly before 11 p.m.
There was smoke and water damage down to the lower level, one tenant said.
No injuries were reported. The official cause wasn't immediately determined, although a tenant said she thought it was electrical.
Mutual aid responders included Englewood and Teaneck, firefighters, along with EMS units from the Hackensack Volunteer Ambulance Corps and Hackensack University Medical Center.
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