Mashable: Hackers have attacked 19,000 French websites in the aftermath of the raid on the office of Charlie Hebdo, according to France’s cyberdefense chief.

The attacks were carried out by “more or less structured” groups, including some well-known Islamic hacking groups, Adm. Arnaud Coustilliere, head of the French Army’s cybersecurity department, told reporters on Thursday.

Coustilliere defined them as “defacement,” referring to common attacks in which hackers take control of a site and replace its content.

“That’s never been seen before.

It’s the first time that a country has been faced with such a large wave,” he said.