Some Facebook users received the unsettling shock as an unexplained glitch caused the social networking service to post a notice that implied they were dead.
A number of Facebook users reported that their profile page on the social network was topped with a message that referred to them by name — as if they were gone — while linking to a feature that "memorializes" the page of someone who has died.
The message said Facebook hoped the users' loved ones would find comfort in seeing posts that others shared about them.
Even Facebook Chief Executive Mark Zuckerberg's page had the death notice for a short time Friday. But messages had disappeared by midday California time.