TEHRAN, Iran -  More than 70,000 Iranian students have volunteered to carry out suicide bombings against Israel, Iran's state news agency reported Monday, but President Mahmoud Ahmadinejad has not responded to their request for permission.

According to the official IRNA news agency, hardline student leader Esmaeil Ahmadi said the students want to fight Israel in support of Hamas, Gaza's Islamic militant rulers.

Iran is Hamas' main backer, though the country denies sending weapons to the Islamic militant movement that took control of the Gaza Strip in 2007. Iran considers Israel its archenemy, and Ahmadinejad has called for the destruction of the Jewish state.

In an open letter to Ahmadinejad, the students said "volunteer student suicide groups ... are determined to go to Gaza. You are expected to issue orders to the relevant authorities to pave the way for such action." A copy of the letter was made available to The Associated Press last week.

The hard-liners started signing up volunteers after Iran's supreme leader, Ayatollah Ali Khamenei, issued a religious decree Dec. 28 saying anyone killed while defending Palestinians in Gaza against Israeli attacks would be considered a martyr.

Israel's bombardment of Gaza, which has killed hundreds of Palestinians, has outraged many in Iran and throughout the rest of the Muslim world. Israel says it launched its campaign in retaliation for Hamas rocket fire aimed at civilians in southern Israeli towns.