The hacker collective known as Anonymous has vowed to take down terrorists websites.

This week, the collective took down ansar-alhaqq.net. This was just the first volley in their vow to actively target Islamic State-related Twitter and Facebook accounts to reduce the terrorist group’s ability to spread its message online.

According to a video posted by Anonymous, the campaign is being waged against Islamic State by people from all races, countries, religions, and ethnicity, including "Muslims, Christians, Jews… hackers, crackers, hacktivists, phishers, agents, spies, or just the guy next door…" People "United as one, divided by zero", as Anonymous puts it.

The collective offered this warning after stating: "Remember the terrorists that are calling themselves Islamic State, ISIS, are not Muslims."

• We will hunt you, take down your sites, accounts, emails, and expose you…

• From now on, no safe place for you online…

• You will be treated like a virus, and we are the cure…

• We own the internet…

• We are Anonymous; we are Legion; we do not forgive, we do not forget, Expect us.