Israeli Prime Minister Benjamin Netanyahu stressed Monday that his country will continue its "fight" to prevent Tehran from developing nuclear weapons, during a memorial ceremony for the victims of the Holocaust attended by Reza Pahlavi, son of the former Shah of Iran .

Referring to his recent visit to Berlin, Netanyahu said that since Nazi Germany, "the world has changed, but calls for our annihilation have not stopped, and today they are being launched by the terror regime in Tehran."

"We are firmly fighting against any nuclear agreement with Iran that paves the way for it to acquire nuclear weapons," the Israeli prime minister said in a speech on the eve of the Holocaust.

"For the same reason, we are resolutely waging a battle against the terrorist agents around us," Netanyahu continued in his speech at the Yad Vashem Holocaust memorial in Jerusalem, warning of Israel's "crushing response" to any hostile approach.

The ceremony was attended by Reza Pahlavi, son of the Shah of Iran who was overthrown by the Islamic Revolution in 1979.

Prior to the ceremony, Pahlavi, who arrived Monday in Israel on his first visit to the Jewish state at the invitation of Intelligence Minister Gila Gamliel, said that the current Iranian regime does not represent the Iranian people.

"Today, when we have a regime that denies the Holocaust at all, it is my duty to be here representing my countrymen, to honor the victims of the Holocaust and pay my respects," he told reporters.

Negotiations aimed at reviving the landmark agreement concluded in 2015 between Tehran and the major powers (Britain, China, France, Germany, Russia and the United States), officially known as the Joint Comprehensive Plan of Action, have reached an impasse and have been stalled since last year.

The United States withdrew from the agreement in 2018 under President Donald Trump and reimposed sanctions on Iran, prompting Tehran to gradually backtrack from its commitments.

In February, a report by the International Atomic Energy Agency indicated that it had discovered particles of uranium enriched to 83.7 percent, just under the 90 percent needed to produce an atomic bomb, at the underground Fordow plant, 100 kilometers south of the capital, Tehran.

Iran denies that it is seeking to acquire atomic weapons, stressing that it has never attempted to enrich uranium by more than 60 percent.