Former heavyweight world champion Mike Tyson's four-year-old daughter died on Tuesday, a day after accidentally catching her neck in a cord on a treadmill at her home, police said.
"I was just advised by investigators that Exodus Tyson was pronounced deceased at 11:45 am today at the hospital," Phoenix police spokesman Andy Hill said. "Our sympathies go out to the family."
Exodus Tyson had been hospitalised on life support since Monday, when she was found with her neck wrapped in the cable of the exercise machine by her seven-year-old brother.
The boy summoned his mother from another room, and the 34-year-old woman freed the girl, called an ambulance and tried to revive her.
Tyson, who doesn't live in the Phoenix house, arrived on Monday afternoon from Las Vegas and was filmed by television news cameras entering the hospital.
Hill said on Monday that the police investigation of the scene indicated a "tragic accident."
"Somehow she was playing on this treadmill, and there's a cord that hangs under the console - it's kind of a loop," Hill said.
"Either she slipped or put her head in the loop, but it acted like a noose, and she was obviously unable to get herself off of it."