Hackers have attacked 750 Israeli internet sites, including that of the country's largest bank, to protest against Israel's military operations in Gaza.
"You are killing Palestinians, we will hijack your servers," read a message on the home page of the targeted sites on Wednesday morning.
http://english.aljazeera.net/NR/exeres/84000EB1-908C-4A44-9B32-BFC0FE201B31.htm
Left the sites up though, I believe.