Music Festival 2015
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The Oklahoma State Bureau of Investigation is investigating the death of a 34-year-old man at a music festival.

According to the agency's statement, Patrick Murphy died early Saturday at the Backwoods Camping and Music Festival in Stroud, Okla.

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The release said Murphy was subdued by security for exhibiting "erratic behavior" and stopped breathing after he was placed in handcuffs.

The attorney for Event Security LLC says Murphy was naked and running toward the stage when security handcuffed him. The attorney also said he was told Murphy didn't stop breathing until in the ambulance.

Murphy was pronounced dead at a hospital.

Murphy's death is being investigated as a possible homicide, and the Medical Examiner's Office says the cause of death is unknown pending a toxicology report.

Performers at the festival included Odesza and Porter Robinson.