Ascension St. John in Tulsa says they aren’t sure when their systems will be back up after a ransomware attack on their hospital and clinics that began last Wednesday. That attack has caused problems in hospitals in nearly a dozen states across the country.

Ascension tells our news partners at News on 6 that all of their medical centers in Oklahoma are still open but that some emergency patients could be diverted to different local hospitals.

Ascension says doctors’ appointments and surgeries are still going on as planned, but they are reaching out to some patients who need to reschedule.