Iran has reportedly warned that it is planning its next attack against Israel using more powerful warheads than those used in previous attacks, despite warnings from the U.S. against retaliating.

Israel carried out airstrikes on Oct. 26, targeting critical military infrastructure in Iran. These strikes were in response to a wave of approximately 200 missiles launched from Iran into Israel on Oct. 1.

The Wall Street Journal reported that Israel has refrained from striking oil and nuclear facilities in Iran, which are essential for its security. However, Israeli officials have indicated that this policy could change.

Iranian and Arab diplomats have reportedly said that Iran’s conventional army could be involved in the next attack on Israel, following the deaths of four soldiers and a civilian in Israel’s most recent strike. However, using the conventional army doesn’t necessarily mean troops would be deployed. Instead, it could signify that the Islamic Revolutionary Guard, which typically handles Israeli security measures, might not act alone.

Arab and Iranian officials have also stated that Iran does not plan to limit its response to drones and missiles, as seen in previous attacks. Any future missiles used, these officials added, would have more powerful warheads.

In the Oct. 1 attack, the WSJ reported that Iran primarily used four different types of medium-range ballistic missiles.

Behnam Ben Taleblu, a senior fellow at the Foundation for Defense of Democracies (FDD), told Digital that the challenge with signaling an attack is that it must be mutually intelligible. He stated that any successful strike, such as the one carried out by Israel in October aimed at curbing escalation, could be perceived by the Iranian regime as a slight that must be responded to.

“Assessments from Iranian outlets and officials have morphed from trying to downplay the strike to using it to grandstand and threaten revenge,” Taleblu said. “Make no mistake, Tehran still has the capability to respond. The Islamic Republic can still fire considerably more projectiles and with heavier warheads than have been employed in its first two direct attacks against Israel. Escalating without air defenses is either leading with one’s chin or setting the pieces of the puzzle in place to justify a move towards developing atomic weapons.”

On Saturday, Iran claimed it is capable of building a nuclear weapon when Supreme Leader Ayatollah Ali Khamenei vowed a “tooth-breaking” response to the actions of both Israel and the U.S. on Saturday.

Kamal Kharrazi, a top adviser to Khamenei, issued a warning about Iran’s nuclear capacity on Friday, stating that the country might be prepared to alter its policies on using nuclear weapons if the nation faces an existential threat.

“If an existential threat arises, Iran will modify its nuclear doctrine, we have the capability to build weapons and have no issue in this regard,” Kharrazi told Lebanese media.

The threat from Iran remains to be seen.

The WSJ also reported that an Iranian official stated the country does not want to influence the U.S. election with the attack, adding that any response to Israel’s attack on Oct. 26 would come after Election Day on Tuesday but before the winner of the presidential election is inaugurated in January.

Digital’s Anders Hagstrom contributed to this report.