Deceased drum fish littered 20 miles of the river near Ozark, Keith Stephens of the Arkansas Game and Fish Commission told CNN.
The dead fish were first found on Thursday, and fisheries officials are conducting tests to understand what killed them.
"The fish kill only affected one species of fish," Stephens said. "If it was from a pollutant, it would have affected all of the fish, not just drum fish."
Read the full story at the NY Daily News.
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