"The Zionists think that they are victims of Hitler, but they act like Hitler and behave worse than Genghis Khan," Iranian President Mahmoud Ahmadinejad said on Sunday. He was quoted by the Iranian News Agency.
In light of recent events, Iran's Security Council decided to hold an emergency meeting Sunday night.
Earlier, Iran denied Israeli claims that it had troops in Lebanon and that it helped Hizbullah to attack an Israeli warship, saying the guerrilla group could fend for itself without outside help.
OC Northern Command Maj.-Gen. Udi Adam said that Iranian troops are helping Hizbullah guerrillas fire Iranian-made rockets at Israel.
Adam said Israeli forces had identified Iranian troops.
"There are no (Iranian) guards there. Shipment of (Iranian) missiles to Hizbullah is also not correct," Foreign Ministry spokesman Hamid Reza Asefi told reporters Sunday.
Asefi also warned Israel that attacking Syria and expanding the conflict in the region would bring the Jewish state "unimaginable damages."
"We hope the Zionist regime does not make the mistake of attacking Syria. Expanding the front of aggression and attacks ... will definitely face the Zionist regime with unimaginable damages," Asefi said.
Israel said Saturday that 100 Iranian troops from the elite Revolutionary Guards were in Lebanon, and that they helped Hizbullah fire a sophisticated radar-guided missile at an Israeli warship blockading the Lebanese coast late Friday.
Initially, it was believed that an unmanned drone laden with explosives had hit the Israeli warship, but it later became clear that Hizbullah had used what Israel described as an Iranian-made, radar-guided C-802 missile.