Tennessee Poison Center Medical Director Donna Seger says the teens evidently thought they could drink methanol, which is extremely toxic, as a substitute for ethanol, the ingredient in alcoholic beverages that causes intoxication.
Watch the report below on one of the teens' deaths.
Seger says the Robertson County teens didn't realize drinking methanol could kill them, and she called last week's poisonings an accident.
She says this is the first time she has seen this type of poisoning. The four cases are the only ones reported in Tennessee, and Seger is not aware of any cases in other states.