Hackers released a video statement condemning the gun attack on the French magazine Charlie Hebdo.
The group Anonymous describes the short film as a “message for al-Qaeda, the Islamic State and other terrorists”.
In it, a masked and hooded figure with a distorted voice threatens in French: “We are declaring war against you, the terrorists.”
The video was uploaded to the group’s Belgian YouTube account.
Seated in front of a desk holding a piece of paper, the figure claims the group will track down and close all accounts related to terrorists on social networks to avenge the French victims.
The video featured the hashtag #OpCharlieHebdo, meaning Operation Charlie Hebdo.
But critics say taking down extremist websites could make it harder for security forces to monitor terrorists.
