Four people in Idaho and Washington have been sickened in a multistate outbreak of E. coli that killed one person in Wisconsin. In Idaho, three people were sickened, but only one was hospitalized.

Idaho health officials have asked all grocery stores to voluntarily remove fresh bagged spinach from their produce shelves.

In addition to the death in Wisconsin, 20 people were reported ill in that state, 11 of them in Milwaukee. Besides Washington and Idaho, victims have been identified in Connecticut, Indiana, Kentucky, Michigan, New Mexico, Ohio, Oregon, and Utah.