London: A cyber attack -- officially known as a "distributed denial of service" attack -- took the BBC website and streaming service, iPlayer, offline on Thursday.
Visitors to the sites were greeted by an error message, "Error 500 - Internal Error," which stayed in place for around three hours.
The BBC initially described it as a "technical issue."
The press office tweeted: "We're aware of a technical issue affecting the BBC website and are working to fix this now. We'll update you as soon as we can."