Flames broke out inside a single-family home at 12 Cameron Rd. around 11:45 a.m.
When the Tenafly Fire Department arrived at the scene, they made sure there was no one inside.
Officials say one woman had been evacuated before first responders got there.
She was taken to Hackensack University Medical Center for smoke inhalation and severe burns;.
Her condition is currently unknown.
The arson squad in the Bergen County Prosecutor's Office is leading the investigation into the cause of the fire.
This story will be updated as more information becomes available.
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