The Russian ambassador to Turkey, Andrey Karlov, was assassinated in Ankara by an off-duty policeman. During the attack, the assailant reportedly shouted "Don't forget Allepo!" and "Allahu akbar!" Read more at CNN, The New York Times and Reuters.
In Berlin, Germany, a truck was driven into a Christmas market near the Kaiser Wilhelm Memorial Church. So far, nine people have been killed and over 50 injured. Read more at the Daily Mail, Politistick and The Guardian.