According to Luxerazzi:
Grand Duke Henri has sent a letter of condolences to the German Federal President…in light of the Berlin attack on Monday night. During a truck ramming attack at a popular Christmas market, twelve were killed and 49 others injured. The Grand Duke wrote:
Dear Mister President,
Shocked by the tragic events at the Berlin Christmas market, the Grand Duchess and I would like to express our dismay and sympathy on behalf of the Luxembourgish people.
Our thoughts are with the victims and the many injured and their families.