
Diesel, a French police dog, was killed on Wednesday in a raid on an apartment in St Denis where terrorists linked to the attacks in Paris last Friday were holed up.
Following the news, in a week that had caused so much human loss in Paris, Beirut and Baghdad, emotion poured out of people across the world.
The hashtag #JeSuisChien ("I am dog") began to trend on social media as people paid tribute to the dog and the sacrifice it made to make the world a safer place.
Since then, people on social media have been sharing other images of dogs who have served in police units, army battalions and border patrols across the world...
All pictures: Getty
More: People were wondering whether Kay Burley would tweet #JeSuisChien, and she did not let anyone down