JERUSALEM — An international group of pro-Palestinian hackers said they leaked the credit card details of thousands of Israelis in an escalation of cyber attacks on Israeli targets.

The group, called OpFreePalestine, claimed to have published online Thursday the details of 26,000 Israeli credit card holders.

Most of the list comes from a list posted in January by a Saudi hacker, Ynet reported. Many of the details are incorrect or partial, according to the report.

OpFreePalestine is part of Team Poison, which was founded two years ago with the goal of attacking Israeli and American targets online. It reportedly has hacked major websites, including high-tech companies and the computer systems of countries that have ties with Israel, according to Haaretz.

Pro-Palestinian and pro-Israeli hackers have been attacking each other on the Internet in recent weeks. Thousands of credit card details, mostly of Israelis, have been exposed, and the websites of Israeli targets such as the Tel Aviv Stock Exchange and two hospitals were shut down.