The fire caused extensive damage to 12 units at the Valley Glen condos in Maple Shade, according to reports.
All.but one resident escaped the fire safely. That person was treated for smoke inhalation, officials said.
The Red Cross was helping to relocate displaced residents.
Firefighters from several towns were called about 3:45 a.m. and battled the blaze for hours.
They were still dousing hot spots about 9 a.m.
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