A number of NBC's sites appear to have been infiltrated by hackers — NBC's mobile landing, Saturday Night Live site, and NBC Sports Rotoworld forums are currently defaced with a message reading "hacked by pyknic." The hacked page shows scrolling text that reads "Remember, remember, the fifth of November," and a note saying that "user info" and "passwords" had been exposed. It's not clear if this is just a Guy Fawkes prank or something worse, but we've reached out to NBC for comment and will update you if we receive more information.

Update: NBC's sites are back to normal, and it looks like they've gotten the situation under control — though there's still no word on how or why the attack took place.

Thanks, stasguy!