A Minnesota woman who was hospitalized with damage to multiple organs after she was overcome in an Arizona sweat lodge ceremony died Saturday, sheriff’s officials said.

The death of 49-year-old Liz Neuman brings the total number of deaths from the Oct. 8 incident at a resort near Sedona to three, Yavapai County sheriff’s spokesman Dwight D’Evelyn said.

Authorities are treating the deaths as homicides, but no charges have been filed.

James Arthur Ray has become a self-help superstar by packaging his charismatic personality and selling wealth. Those who first attend his free seminars hear a motivational mantra that promises that they can achieve what he calls “Harmonic Wealth” — on a financial, mental, physical spiritual level.

He uses free seminars to recruit people to his expensive seminars, starting with $4,000 three-day “Quantum Leap” workshops and moving on to the weeklong $5,300 “Practical Mysticism” events and the $9,000-plus “Spiritual Warrior” retreats like the one that led to the sweat lodge tragedy.

The investigation into the two deaths and numerous injuries that occurred during a James Arthur Ray “Spiritual Warrior” seminar at the Angel Valley Retreat near Sedona has turned from a death investigation into a homicide investigation, said Yavapai County Sheriff Steve Waugh said.

Asked why the deaths have been classified as homicides and the investigation upgraded, Waugh said, “We believe there are indications that it was not accidental, and … we feel that there should be some culpability on some individuals.” [video]

The owners of a resort where two people were overcome in a sweat lodge and later died are asking for prayers in hopes that something positive will come out of what they say was a tragic and unexpected accident.

The Hamiltons had rented the facility just outside Sedona to self-help expert James Arthur Ray for his five-day “Spiritual Warrior” retreat.

James Arthur Ray, the organiser of a US spiritual retreat, during which two people died and another 19 had to be admitted to hospital, has been caught deleting potentially incriminating tweets he published during the event.

US authorities are trying to determine if criminal negligence played a role in the deaths, which occurred in a sauna-like sweat lodge at a resort in Arizona during a two-hour “spiritual cleansing ceremony” last Thursday evening.

Two people have died and 19 others were taken to hospital after being overcome while in a sauna-like room at a spiritual retreat in Arizona.

Investigators are speaking to staff and guests and carrying out toxicity tests in an effort to find out what happened.

Reports said some of the sweatbox participants had paid up to $9,000 for their stay at the retreat. [video]