Major fish kill investigation

Dead fish along a creek
Dead fish are seen along Rush Creek near Lewiston, Minn., on Wednesday. State agencies are investigating a fish kill along the creek that left an estimated 2,500 fish dead.
Photo by Carl Berberich, courtesy of Minnesota Trout Unlimited

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State agencies are investigating what killed an estimated 2,500 fish, mostly brown trout, along a stretch of trout stream in southeastern Minnesota earlier this week.

The fish kill happened on Rush Creek, near Lewiston in Winona County. The Minnesota Pollution Control Agency, which is investigating the fish kill along with the departments of agriculture and natural resources, says it doesn't think the fish died naturally.

Previous fish kills have been linked to chemical runoff from farms after heavy rain — and storms dropped heavy rain in parts of southern Minnesota last weekend.