BATTLE OF THE LOOSE COLLECTIVES:

The hacking group Anonymous appears to have declared war on the Islamic State in Iraq and Syria (ISIS) in the wake of Friday's devastating terror attacks on Paris.

In an unverified video posted to YouTube on Saturday, a spokesperson wearing the group's signature Guy Fawkes mask warned the group that "war is declared" and to expect "major cyberattacks."

"Anonymous from all over the world will hunt you down. You should know that we will find you and we will not let you go. We will launch the biggest operation ever against you," the spokesperson said in French. 

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