ROCHESTER, Minn. (KTTC) -- Three people sickened by salmonella have been released from the hospital.
Olmsted County Public Health says they ate at the Denny's restaurant in Rochester between July 2 and 7.
There have been no additional cases.
Health officials are looking into whether the salmonella came from a food source or an ill worker.
Denny's has been cooperating with the investigation.