CBC News reports five cases of E. coli O157:H7 have been confirmed in New Brunswick, with two in Saint John and three in Fredericton.

Dr. Eilish Cleary, the Chief Medical Officer of Health said in a statement it’s unclear if the cases have a common source, adding, “A number of sources are being investigated and we are still gathering information.”

One of the patients was admitted to hospital, the other four were treated in hospital and released, said Cleary.