Dehydration and kidney failure were reported at the retreat
A woman taken to hospital with multiple organ failure after attending a spiritual retreat in Arizona has died.
Forty-nine-year-old Liz Neuman was one of 21 people taken to hospital after the sauna-like experience on 9 October.
It brings the total number of deaths from the event, run by self-help expert James Ray, to three.
The deaths at the Angel Valley Retreat Center, 115 miles north of Phoenix, are being treated as homicides, but no charges have been laid.
Emergency services were called to the sweat lodge after some of the 50 people at the event reported they were having difficulty breathing.
Those taken to hospital were said to have illnesses ranging from dehydration to kidney failure.
Mr Ray, who has appeared on The Oprah Winfrey Show and Larry King Live, had rented the centre for his five-day "Spiritual Warrior" event, according to Associated Press.
Reports said some of the participants had paid up to $9,000 (£5,700) for their stay at the retreat, which also reportedly included a 36-hour fast.
A spokesman for Mr Ray, Howard Bragman, said they were co-operating with police investigations.