Firefighters responded to Haddonfield Commons at 400 North Haddon Ave. at 5:24 a.m., the Borough of Haddonfield said.
No injuries were reported as firefighters brought the two-alarm fire under control, authorities said.
Twelve units have been deemed uninhabitable due to fire and smoke damage, authorities said. The Red Cross is on location to assist displaced residents with temporary shelter and support services, authorities said.
The Camden County Fire Marshal is investigating the cause of the fire, authorities said.
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