The S.C. Department of Health and Environmental Control is investigating nine reports of salmonella poisoning in Beaufort County, including one illness matched to a national cluster of salmonella, according to a state official.

The department has received reports of eight people with gastrointestinal symptoms, and laboratory testing has confirmed “some” are salmonella infections, DHEC spokeswoman Cassandra Harris said Friday.

Health officials received the reports Sept. 19, but have not yet determined if there is a common source that caused the illnesses, she said.

The investigation is ongoing, she added.

The U.S. Centers for Disease Control and Prevention also has asked for DHEC’s help in investigating a separate, single case of salmonella poisoning that matches a national cluster of salmonella, Harris said.