The Utah Division of Wildlife Resources is investigating after 300 brown trout were found dead in the Provo River Tuesday morning.
The fish were found in a 500-yard stretch of the river in the Paul Reams Wilderness Park area.
There is reportedly no sign of a chemical spill and wildlife experts are currently looking into another scenario that may have caused the fish to die.
“We often see fish kills associated with low oxygen,” said Chris Crockett, with the Utah Division of Wildlife Resources. “It’s a combination of high temperatures and low flow that you see this time of year creates an area of low oxygen which can often can stress the fish and cause mortalities.”
Crockett said they will collect samples of the water for testing to further determine what caused the fish to die.