Armed conflicts and attacks
2018 Strasbourg attack
A gunman kills two people and injures 14 others in a mass shooting in Strasbourg, France, during the annual Christmas market. The shooter flees the scene but is identified by police as a known extremist. The incident is being treated as an act of terrorism. (BBC) (The Daily Telegraph) (The Guardian)
Disasters and accidents
Five U.S. Marines who were missing after two aircraft collided mid-air off the coast of Japan on December 6 are declared dead. (The Japan Times)