Officials said Thursday that the remaining two critically injured victims died of their injuries.
Two of the victims were previously pronounced dead on Tuesday.
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The apartment went up in flames Sunday afternoon at 565 West 190th Street.
The FDNY said the fire marshal determined a lithium-ion battery sparked the flames in the fourth-floor apartment.
Neighbors said Sunday they were worried about the victims. All the victims are adults, but one in particular had neighbors very concerned - a 98-year-old woman who has lived in the building for at least 40 years. She is like a grandmother figure to many of the neighbors who grew up with her.
Firefighters are urging anyone who has lithium-ion batteries in their home to ensure they are using them safely.
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