Story highlights Two other boys got sick but were treated and released from a hospital

Officials say "dewshine" not known to have caused any other deaths

(CNN) "Dewshine," a mixture of Mountain Dew and methanol-based racing fuel, is the likely cause of the recent deaths of two Tennessee teens, a poison control official said Wednesday.

Two other boys who drank the mixture at a party last week were hospitalized, treated and released, said Dr. Donna Seger, executive director of the Tennessee Poison Center.

The Greenbrier Police Department identified the deceased as Logan Stephenson, 16, and J.D. Byram. Stephenson died last Thursday and Byram died Monday.

"This was an unfortunate accident," Seger said. The doctor told CNN the four boys were in a group that purposely mixed the soda with methanol (instead of ethanol).

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