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

Taj's Gibson's cousin, Prince, was only two weeks away from his 7th birthday. (Issac Baldizon/NBAE via Getty Images)

The 6-year-old cousin of Bulls power forward Taj Gibson was stabbed to death in a Brooklyn elevator Sunday evening.

According to the New York Daily News, Prince Joshua Avitto and his 7-year-old playmate Mikayla Capers were in the elevator going to get some ice cream at about 6 p.m., when an unidentified person wielding a butcher's knife attacked them.

The attacker, a heavyset man believed to be in his 20s, stabbed both children in the torso on the elevator somewhere between the first and fourth floors after telling them to “shut up,” police sources said.

Both children were rushed to the hospital, where P.J. died.

Gibson, who grew up in Brooklyn, later posted a photo on Instagram in remembrance of his young cousin.

"They killed my lil super man. #rippj only two more weeks until your 7 birthday. Tears forever this can't be life #foreversuperman #babycuzz"