CLOQUET (AP) - A lawsuit has been filed over an E. coli outbreak on a Chippewa reservation in northeastern Minnesota.

Bob Danielson, a member of the Fond du Lac Lake Superior Chippewa reservation near Cloquet, is suing Jim-N-Jo's Northland Katering.

It provided the food at three events in July at which people got sick.

Reports say the state Department of Health is investigating whether it came from ingredients in a potato salad that Danielson ate at an elder's picnic, where 20 to 60 people likely became ill.

The said he was hospitalized for a day.

Danielson filed suit Aug. 28 in Carlton County and is seeking compensation for medical expenses and loss of wages.

The owner of the catering company declined comment