TEHRAN, Iran  —  Iranian President Mahmoud Ahmadinejad on Friday called Israel's leaders a "group of terrorists" and threatened any country that supports the Jewish state.

"You imposed a group of terrorists ... on the region," Ahmadinejad said, addressing the U.S. and its allies. "It is in your own interest to distance yourself from these criminals... This is an ultimatum. Don't complain tomorrow."

"Nations will take revenge," he told a crowd of thousands gathered at a pro-Palestinian rally in the capital Tehran.

Ahmadinejad said Israel no longer had any reason to exist and would soon disappear.

"This regime, thanks to God, has lost the reason for its existence," he said.

"Efforts to stabilize this fake (Israeli) regime, by the grace of God, have completely failed... You should believe that this regime is disappearing," he said.