Cartoonists have reacted to the Charlie Hebdo massacre in Paris by picking up their pens and pressing ink to paper. Many posted their creations on Twitter, an act of solidarity with the 12 killed after three masked extremists burst into the satirical magazine's newsroom on Wednesday morning.
Here are some of the best:
Alongside independent artists, cartoonists from several media organisations, including Le Monde and The Washington Post, also published drawings marking the event. Many used only red and black in their work, the official colours of the Charlie Hebdo magazine.