An aide to Iran's supreme leader said Israel's military threats had "put Israeli citizens one step away from the cemetery" and that Hezbollah was ready to hit back.
Yahya Rahim-Safavi, military adviser to Ayatollah Ali Khamenei and a former commander in chief of Iran's Revolutionary Guards, said the increasing threats from Israel to strike Iranian nuclear facilities were "foolish," the Iranian Students' News Agency reported on Friday.
"The boldness and foolishness of Israeli officials in threatening the Islamic Republic have put Israeli citizens one step away from the cemetery," he said. "If, one day, the Israeli regime takes action against us, resistance groups, especially Hezbollah ... will respond more easily."
Prime Minister Benjamin Netanyahu has made increasing hints in recent weeks that Israel could strike Iran and has criticized U.S. President Barack Obama's position that sanctions and diplomacy should be given more time.
The heightened rhetoric has stoked speculation that Israel may attack before the U.S. elections in November.
Hezbollah has said any attack on Iran would be met by strikes against Israeli and U.S. targets in the region, even if American forces played no role in the attack.
"A decision has been taken to respond, and the response will be very great," Hezbollah leader Hassan Nasrallah said in a TV interview this month.