Israel's media is reporting that the country's websites are under cyberattack, but most targeted sites do not appear to have been affected.
Posters using the name of the hacking group Anonymous had warned they would launch a massive attack on Israeli sites in a strike they called (hash)OpIsrael.
Israel's Bureau of Statistics was down on Sunday morning but it was unclear if it was hacked. The media said the sites of the Defense and Education Ministry as well as banks had come under attack the night before but they were mostly repelled. Israeli activists hacked sites in Pakistan, the media said.
Hackers have tried before to topple Israeli sites. A concerted effort to cripple Israeli websites during November fighting in Gaza failed to cause serious disruption.