On December 19, 2016, terrorist Anis Amri hijacked and then drove a truck into the Christmas market next to the Kaiser Wilhelm Memorial Church in Berlin, killing 12 people and injuring 56 more. The Islamic State of Iraq and the Levant claimed responsibility for the attack. As of 2023, the attack was the worst Islamic terrorist attack in German history. Amri, who was originally from Tunisia, was killed in a shootout with Italian police several days later. Investigations highlighted grave mistakes by the German police, which had failed to keep Amri under surveillance in the months leading up to the attack even though he was known as a violent and potentially dangerous Salafist terrorist. Both federal and local police initiated a range of reforms as a consequence of these failures, including the employment of additional personnel.