An intruder gained access to patient and physician information at Conway Regional Medical Center after an email phishing attack.

Patients who may have been affected were notified last month. In a letter dated Aug. 23, the hospital system says the breach was discovered in June after “unusual activity” surrounding employee email accounts was detected.

KATV reports Conway Regional Health System said in a statement Wednesday, patient names, addresses, Social Security numbers, health insurance information and “limited” medical information may have been accessed as part of the data breach.

The hospital system did not say how many patients were affected, but said it had not found any incidents where the information was misused.