The officials warned the United States not to intervene in the escalating conflict after Tehran launched hundreds of drones and missiles.

Iran on Sunday warned Israel and the United States that it would carry out a larger attack if either country retaliates against Tehran’s overnight missile and drone attack, saying that U.S. military bases could be in its crosshairs.

Iran launched explosive drones and shot missiles at Israel late on Saturday in what has been described as its first direct attack on Israel. The Islamic regime has said that the attack was warranted after Israel’s bombing a Syrian compound in early April that left seven members of its Revolutionary Guard Corps dead.

“Our response will be much larger than tonight’s military action if Israel retaliates against Iran,” armed forces chief of staff Major General Mohammad Bagheri told state-run media on Sunday, saying that Iran warned the United States that any support of an Israeli counterattack against Iran would lead to American bases being targeted. All U.S. assets and bases in the region could be targeted, he added.