DUNDEE, Iowa (AP) — Authorities are trying to find the source of a fish kill at a state park in eastern Iowa. The Iowa Natural Resources Department reports that trout anglers reported spotting dead trout and other dead fish in Richmond Springs and Fenchel Creek at Backbone State Park. The park sits about 2.5 miles north of Dundee. Authorities found dead fish but also live fish in several sections of the stream on Saturday. The department says heavy rains Friday night might have washed contaminants into the streams.