Taj Gibson's 6-year-old cousin stabbed to death in Brooklyn

A man with a kitchen knife stabbed two young children, one fatally, in an elevator in a New York City apartment building on Sunday evening, police said.

Police found Prince Joshua Avitto, 6, and a 7-year-old girl with stab wounds to their torsos at the building in Brooklyn's East New York neighborhood after responding to a 911 call.

Avitto is the cousin of Chicago Bulls power forward Taj Gibson, WGN-TV reported.

Gibson posted a photo of his cousin to Instagram saying: “They killed my lil super man. #rippj only two more weeks until your 7 birthday. Tears forever…this can’t be life #foreversuperman #babycuzz”