iPhone users receive spyware attack warning from Apple

"Apple detected that you are being targeted by a mercenary spyware attack that is trying to remotely compromise the iPhone associated with your Apple ID -xxx-," the message read.

Apple's alert went on to share additional information about the incident. "This attack is likely targeting you specifically because of who you are or what you do. Although it's never possible to achieve absolute certainty when detecting such attacks, Apple has high confidence in this warning — please take it seriously," the alert continued.

Apple explained that it couldn't provide any information about what prompted the message out of concern that additional information would help attackers avoid future detection. The company uses internal information and investigations to pinpoint attacks.