Boxer Mike Tyson's 4-year-old daughter died Tuesday, a day after suffering a bizarre choking accident on a home treadmill.
The ex-champ was at the hospital bedside of Exodus Tyson, who had been clinging to life after she accidentally got tangled up in a cord on the exercise machine Monday.
She was pronounced dead at 11:45 a.m. local time, Phoenix police Sgt. Andy Hill said.
"Our sympathies go out to the family," he said.
Exodus Tyson's older brother was watching TV and their mom was cleaning their central Phoenix home when Exodus apparently started playing with the machine alone.
A cord looped around the girl's neck and somehow choked her. She was unconscious when her brother found her and her mother dialed 911.
"It's kind of a loop," Hill said. "Either she slipped or put her head in the loop, but it acted like a noose."
Police called the incident a "tragic accident."
Tyson, 42, who was the youngest heavyweight champion in boxing history, was in Las Vegas at the time of the accident. He flew home and was spotted outside St. Joseph's Hospital and Medical Center, where doctors tried for hours to save the preschooler's life.
"The Tyson family would like to extend our deepest and most heartfelt thanks for all your prayers and support," the fighter said in a statement.
The girl's mother, who has two children with the former world heavyweight champion, has been living in Phoenix for about five years.
Neighbors called her a doting mom who was often seen outside playing with the kids.
"It's just very sad ... they're just lovely," neighbor Heather Brodhurst told TV reporters. "They ride their little bikes down the street."
"It's terrible," said Abby St. Jermain, whose parents live down the block. "The kids are so sweet. We always see them riding their bikes, playing. They've just been wonderful people."
Dinka Radic, who lives across the street, described Exodus as smart and sweet.
"The little girl, she says, 'You got chocolate in your house?'" Radic said. "I say 'Yes,' and she says, 'Okay, give me some.' Very nice."