Israeli hackers on Tuesday published a list containing the names and credit card details of citizens of Saudi Arabia, Channel 2 News reported. The hackers said they were “returning the favor” after the credit card details of Israelis were published several times last week by Saudi hackers. Channel 2 reported that the list was posted on Pastebin, the same website used to publish the credit card details of thousands of Israelis. The list contained the names of the card holders, their e-mail addresses, credit card numbers, expiry dates and the phone numbers of their respective owners. On Monday, a group of Israeli hackers threatened to hack into Saudi servers and publish credit card data as a method of revenge against the publishing of Israeli numbers. A spokesperson for the Israeli hacker group said that the group had been “taken by surprise” by the successful Saudi escapade. “In the first few days after it happened we were silent, but now we have decided not to remain silent any longer, and we set up a group to hack into computers in Arab countries and reveal as much information as possible about citizens of those countries, including credit card details.” The Saudi hackers first exposed a list of Israelis’ information last Monday, claiming they possessed the information of some 400,000 Israelis. It was later revealed that the number of charge card accounts that had been hacked is about 15,000. Last Thursday, the details of 11,000 more cards were published. More than half of these are out of date, however. An Israeli blogger later claimed that he was able to figure out the identity of the hacker and said he believes the hacker, whom he identified as Omar Habib, is based in Mexico, although a citizen of the United Arab Emirates , and not in Saudi Arabia. Deputy Foreign Minister Danny Ayalon has warned that hackers who attempt to attack Israel in cyberspace will be met with a "forceful response" -- one comparable to the response meted out to terrorists.