COUGAR, Wash. -- At least two deaths have been reported at the Rainbow Gathering in Southwest Washington, the latest was a woman found dead Wednesday.

Skamania County officials said the body of 28-year-old AmberKellar, of Weed, California, was found at the site in the Gifford Pinchot national Forest Wednesday, as first reported in The Vancouver Columbian. A Good Samaritan was doing CPR when paramedics arrived.

There was no immediate cause of death and deputies suspected it was medically induced, meaning she initially suffered some sort of medical problem.

Sheriff's spokesperson Jackie Mikel said there were no signs of drug use on or near her body.

There was no drug paraphernalia or narcotics at the scene. We have no persons of interest, we re just waiting for the medical examiner's office to tell us definitively the cause of death, Mikel said.

Medical examiners were expecting a toxicology report in the coming weeks, the paper said.

Around 20,000 people were estimated to attend the event, which culminated on July 4 in Skookum Meadow and wind down this week.

Since 1972 the leader-less counterculture rainbows have gathered annually in different national forests.

Marijuana and psychedelic drugs abound - but harder drugs and alcohol are prohibited, one man told Spokane's KREM TV.

KGWReporter Tim Gordon contributed to this report

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