A neighbor tells TMZ the other victim was Jennifer's brother Jason. A cousin who lived nearby discovered the bodies.

We're told the two bodies were found dead on the scene at 2:44 PM. When the fire department arrived and discovered the bodies, police were brought in and the home was declared a crime scene.

UPDATE 6:40 PM PT: An all points bulletin has been issued for a boy, believed to be Hudson's 7-year-old nephew, who may have been taken from the scene. Police are looking for 1994 white Suburban with the license plate X584859. - the latest on this story

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