A woman in a red dress flagged down a group of bystanders for help as a Burning Man attendee bled out in her tent, a witness has claimed.

Vadim Kruglov, 37, was found dead in a pool of blood at the Nevada festival at about 9:15 p.m. on August 30 in what authorities have described as a 'deliberate homicide'.

Kruglov had been stabbed multiple times and his throat slashed, law enforcement sources told TMZ. Police also found a knife and cellphone in the tent near his body.

A witness who claims she helped alert police of Kruglov's death has now revealed the moment she and her partner were dragged into the chaos by a mystery woman.

The unidentified woman, described as being in her 50s or 60s, stopped the couple as they were driving out of Black Rock City, according to The Hollywood Reporter.