The North Carolina Division of Public Health is investigating an E.coli outbreak in Wake County, affecting at least six children and one adult, state health department spokeswoman Renee McCoy said Tuesday.

Four people were hospitalized – two had been discharged and two were in intensive care Tuesday, McCoy said. The state is working with the Wake County Health Department to determine whether the cases are related.

They were still interviewing patients on Tuesday and awaiting the results of lab tests, which should be completed next week, McCoy said.