Iran poses a "nightmare" for Israel as the UN watchdog reports Tehran's nuclear programs are unchecked.

On Monday, Iran reiterated its threat of a "nightmare" attack on Israel after the assassination of Hamas leader Ismail Haniyeh in late July, as international tensions persist over Tehran's unchecked nuclear development program, which has been ongoing for over three years.

According to the Jerusalem Post, Hossein Salami, commander of Iran's Islamic Revolutionary Guard Corps, stated that Israel is experiencing a "nightmare" of Iran's imminent response, which keeps them on edge day and night, as reported by Al-Arabiya, a Saudi-owned news outlet.

The commander reportedly stated that Israeli leaders are concerned about the unclear threat of a "painful and distinct" attack that differs from "what you anticipate."

For over a month, Iran has been issuing threats to Israel, similar to those set by Salami, following the assassination of Haniyeh during a trip to Tehran on July 31.

Israel has been accused by Iran of carrying out the assassination, despite Jerusalem's denial of any involvement.

Tehran has been cautioned by the U.S. and other Middle Eastern countries not to attack Israel, as there is a risk of a broader regional war. However, there are still concerns that Iran may retaliate through Hezbollah, the Lebanon-based terrorist organization it has supported for decades.

On Monday, Nissim Vaturi, a member of Israel's Foreign Affairs and Defense Committee in the Knesset, expressed his belief that war between Israel and Hezbollah in Lebanon is imminent, stating that it is only a matter of days before conflict erupts.

Vaturi advised that Israel should adopt a bold strategy and launch preemptive strikes against Hezbollah's fortresses in Lebanon, followed by a ground invasion. This approach, experts have cautioned, could result in a higher number of casualties than those experienced during the 12-month conflict in Gaza.

"Our patience has run out, so it's time to deal with the north," he said, according to The Times of Israel.

"He stated that there is no other option and that Beirut's Dahiyeh suburb, a significant Hezbollah stronghold outside the capital city, will resemble Gaza."

Despite its possession of ballistic missiles, Iran has not yet disclosed its plans for a retaliatory strike against Israel.

The United Nations nuclear watchdog issued a warning on Monday, renewing attention to the fact that Iran's nuclear program has been unchecked for the past three and a half years, despite no evidence of possessing nuclear-grade weaponry.

Since Iran stopped implementing its nuclear-related commitments under the JCPOA, it has been more than three and a half years since the International Atomic Energy Agency was able to conduct complementary access in Iran, as Director General Rafael Mariano Grossi informed the agency’s board of directors.

As a result, the Agency has lost track of the production and inventory of centrifuges, rotors, and bellows, heavy water, and uranium ore concentrate.

Grossi stated that Iran has been increasing its stockpiles of highly enriched uranium metals, including those with 60% purity, which is close to the level needed for weapons-grade uranium, which is enriched to 90% purity.

""I urge Iran to address the outstanding safeguards issues by implementing the Joint Statement and engaging seriously with the Agency's proposals," he stated, emphasizing Iran's false claims about declaring all nuclear activities, materials, and locations."

Rossi urged Masoud Pezeshkian, the new Iranian President, to adhere to the agreements made under the March 4, 2023 joint statement and to meet with him in the near future to establish a constructive dialogue that leads to swift results.

On Monday, the European Union (EU) accused Iran of providing short range ballistic missiles to Russia to aid its war effort against Ukraine, citing "credible" information provided by allied nations, as reported by Radio Free Europe.

If Iran is found to have given Moscow escalatory arms, the EU will respond swiftly with new and significant restrictive measures against Iran, according to EU spokesman Peter Stano. The EU is still investigating the information.

On Monday, the Kremlin did not confirm or deny receiving missiles capable of carrying nuclear, chemical, and conventional warheads.