ST. PAUL (AP) — Minnesota health officials are investigating an outbreak of E. coli infection, with some of the cases traced to eating at Applebee's restaurants.

The Minnesota Department of Health said Monday it is investigating 13 cases of the foodborne illness. Seven of the people infected reported eating at Applebee's restaurants in Minnesota between June 24 and 27. But health officials say there are multiple cases with no apparent connection to the restaurant.

Applebee's is cooperating with the investigation and has voluntarily temporarily removed its Oriental chicken salad from menus at all of its Minnesota restaurants.

Symptoms of E. coli infection include stomach cramps and diarrhea.

Four of the 13 people who became ill were hospitalized, and all have recovered or are recovering.

Kansas City-based Applebee's has 58 restaurants in Minnesota, including one in Waite Park.

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