Authorities are trying to determine what caused a fire in an East Orange  high-rise apartment building that claimed the lives of an adult and a child.

WCBS TV reports the victims are a 3 year old boy and his grandmother.

The three-alarm blaze began on the 7th floor of the 10-story building at 50 South Munn Avenue in East Orange at 9:30 p.m. Sunday.

City officials say the adult was found dead on the 7th floor.

Firefighters rescued the child, who died at a hospital. Officials have not released their names because they're notifying relatives. Two others were injured.

The fire was brought under control by 10 p.m.

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