ST. PAUL — Minnesota health officials are investigating two salmonella cases involving contaminated raw tuna.

The cases are part of a national outbreak linked to spicy tuna rolls.

The Minnesota Department of Health says two adults were sickened at the end of June. One person became ill after eating spicy tuna rolls purchased at a grocery store. The other was sick after eating at a workplace cafeteria. Neither person was hospitalized. Both are said to have recovered.

Epidemiologist Amy Saupe says the frozen tuna product has a shelf life of two years.