KULR (Billings)- UPDATE: The man who was found unconscious Sunday morning in the Yellowstone River has been identified as James Karls, 67, of Billings. 

According to Yellowstone County Assistant Coroner Rich Hoffman, the manner of death was accidental. 

Deputy Hoffman said Karls died by asphyxiation due to drowning. 

A man was discovered unconscious Sunday morning in the Yellowstone River. 

According to Cpl. Adam Lauwers of the Yellowstone County Sheriff's Office, first responders located a "juvenile" in the area of Old Blue Creek Rd. who helped them locate the unconscious man.

Both the "juvenille" and the "older male" were apparently on a boat when what Cpl. Lauwers says a medical emergency occurred.

This incident happened at approximately 8:13 Sunday morning.

The unconscious male was turned over to AMR upon arrival and the condition of the man at this time is unknown.

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