A series of salmonella cases in recent weeks remain under investigation in Williston, and the state health department is watching to see if any other patients are treated for the illness at local clinics and the hospital. "We’re investigating a cluster of four confirmed salmonella cases," said Kirby Kruger, state epidemiologist for the North Dakota Health Department Friday.

One common denominator in the investigation was a business in the area, Kruger said. He said it involved a product sold as precooked. Kruger said no citations were issued.

He said two of the victims were between the ages of 30 and 65, and two were older than 65. Three were from the same family. "We were aware two were hospitalized," Kruger said.

"We have confirmed a woman has died due to salmonella-related illness," Kruger said. "The woman was older than 65." She was from a group of three that ate from the same source.