The BBC was the latest media company to be targeted by the Syrian Electronic Army, which says it is "supporting the Syrian people against #FSA (Free Syrian Army) terrorism".
Others targeted in the past include the Agence France-Presse news agency, whose @AFPphoto account was taken over last month and images purporting to be from the warzone in Syria were posted.
The group has previously claimed credit for hacking the Twitter and Facebook accounts of Sky News Arabia, Al-Jazeera Mobile, German broadcaster German Deutsche Welle, France 24 and Israeli newspaper Haaretz.
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Armed police have taken part in a dramatic training exercise aimed at recreating the chaos of a Paris-style terror attack.
After a remarkably mild November - a notable mild start to the new month.
The Facebook founder revealed the plan as he and wife Priscilla Chan announced the birth of their baby daughter, Max.