Twin Falls, Idaho ( KMVT-TV / KSVT-TV ) The department of environmental quality is investigating the Snake River.
If you've been on the river below Shoshone Falls you may have noticed a dark sheen just under the surface of the water.
A spokesman from the Department of Environmental Quality tells us he took samples of the water yesterday and sent them off to the lab.
Those results should be back in a few weeks, but as of right now the DEQ has no idea what it is.
There's been no reports of illnesses or dead fish.
We'll continue to follow this story