Anonymous have been blamed for a cyber attack on Israel.
The Central Bureau of Statistics, the defence ministry and the education ministry were reportedly targeted.
In the past Anonymous have vowed to "disrupt and erase Israel from cyberspace".
Last week it was claimed that the group hacked several North Korean websites.
A tweet with the word "hacked" was placed alongside a link to a website displaying the country's flag and a Guy Fawkes mask - a signature move from the cyber movement.
It came as part of its 'Operation Free Korea' push, in which Anonymous call for uncensored internet access for all residents of North Korea.
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