The fire started around 1:30 p.m. Thursday at the Creeks of Marshallton apartment on the 2100 block of Grafton Drive.
Two people are in critical condition.
A third victim, and a 10-year-old girl are in stable condition.
The Action Cam spotted emergency responders giving oxygen to a cat who escaped the flames.
The Delaware State Fire Marshal's Office determined that the blaze was accidental.
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