Chad Terhune reports:
Hackers demanded a ransom from two more Southern California hospitals last week and federal authorities are investigating the case.
Prime Healthcare Services Inc., a fast-growing national hospital chain, said the attackers infiltrated computer servers on Friday at two of its California hospitals, Chino Valley Medical Center in Chino and Desert Valley Hospital in Victorville.
The company said the cyberattack had not affected patient safety or compromised records on patients or staff.
Read more on Kaiser Health News.