Any further attacks from either side could engulf the wider Middle East, already teetering over the Israel-Hamas war in the Gaza Strip and Israel’s ground invasion of Lebanon, into a wider regional conflict just head of the U.S. presidential election this Tuesday.

Iran’s supreme leader on Saturday threatened Israel and the U.S. with “a crushing response” over attacks on Iran and its allies.

“The enemies, whether the Zionist regime or the United States of America, will definitely receive a crushing response to what they are doing to Iran and the Iranian nation and to the resistance front,” Khamenei said in video released by Iranian state media.