Today’s terrorist attack at the Charlie Hebdo magazine was widely covered by citizen journalists and professional photographers. Many added photos to social network sites, here are a collection of the pictures that illustrate the horror of the day.

The Editor of Charlie Hebdo, known as Charb, who was murdered today. Credit: AP

Charlie Hebdo poked fun at everyone. Credit: AFP

Gunmen at their car. Credit: Twitter

Gunmen Shoot French Police Officer. Credit: YouTube

Police arrive to secure street. Credit: Reuters

Victims put into ambulances. Credit: P Dupeyrat/AFP/Getty Images

Emergency services await instructions. Credit: Reuters

A woman is shocked by news of the killings. Credit: AFP

Bullet hole in a window of a nearby building. Credit: Yve Cresson

A second bullet hole shows how many shots were fried. Credit: Twitter

A Police Car was also peppered with bullets. Credit: Twitter

Thousands of police and soldiers flood Paris streets. Credit: Reuters

People take to Twitter to express their defiance. Credit: OECD

The latest meme on Twitter is #JeSuisCharlie (I am Charlie) Credit: The People of France

The American Embassy in Paris joins in. Credit: US Embassy/Twitter

Artist Ali Farzat explains how free speech works in Syria. Credit: Ali Farzat

Artist David Pope drew this because of his sadness at the attack. Credit: David Pope