WASHINGTON (AP) -- U.S. computer networks of a major hospital chain have been knocked offline in a cyberattack.
Universal Health Services, which has more than 250 facilities in the U.S., acknowledged the outage Monday but would not confirm whether ransomware was responsible.
Doctors and nurses at affected hospitals and clinics had to resort to paper records and described chaotic conditions, with lab work backed up.
The company says no patient or employee data appears to have been accessed. The company also has hospitals in the United Kingdom, but a spokeswoman says its operations in that country were not affected.