Anonymous hackers group has posted a video online to warn the Islamic State of Iraq and the Levant of war after the deadly Paris attacks on Friday that killed 129 people and left several injured.

Wearing a Guy Fawkes mask , the announcer addressed the ISIL people in French. The anonymous hackers team indicated that they were trying to find out ways to initiate waves of cyberattacks on the terrorist group after their attempt to destroy the City of Light.

“We are going to launch the biggest operation ever against you. Expect many cyberattacks. War has been declared. Get ready,” the man speaking online in the video warned the ISIL militants, as quoted by the Today’s Zaman . “We don’t forgive and we don’t forget.” The French people are far stronger than the attack planners and the attackers and will soon come out of the atrocity, the announcer added.

The Anonymous hackers collective was earlier an apolitical group of hackers and had no ideology or agenda, but it launched its anti-Islamic State online campaign known as #OpISIS after the Charlie Hebdo massacre that took place in January 2015 in Paris. On Jan. 7, siblings Saïd and Chérif Kouachi opened fire at the French weekly Charlie Hebdo’s office in Paris, killing around 12 people. The hacking collective is said to consist of unrelated volunteers, activists and coders from throughout the globe.

According to an in-depth Foreign Policy investigation, it has been found that the group has unveiled 149 Islamic State-related websites and exposed around 5,900 propaganda videos as well as 101,000 Twitter accounts in last nine months.

The group has four other co-ordinating accounts, including @CtrlSec, @CtrlSec1, @CtrlSec1and @CtrlSec2. However, it is still unknown why the group did not post this video on the hackactivists groups’ YouTube network.

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