Iranian Ambassador to the United Nations Amir-Saeid Iravani condemned U.S. strikes against Iran at the U.N. Security Council meeting on Saturday that had targeted the country’s military leadership and killed Supreme Leader Ali Khamenei, calling the attack a double standard and promising the country would defend itself.

Iravani accused the U.S. of undermining its claims of pursuing international stability while attacking a sovereign country for its "domestic" activities.

"Neither the charter nor international law recognize internal matters of a state as justification for the use of force by other states. The rule of law would be replaced by the rule of force," Iravani said.

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"Iran will continue to exercise its right of self-defense decisively and without hesitation until the aggression ceases in full and unequivocal terms," he added.

On Saturday morning, President Donald Trump ordered the execution of Operation Epic Fury, citing Tehran’s continued efforts to develop a nuclear weapon.

"It has always been the policy of the United States, in particular my administration, that this terrorist regime can never have a nuclear weapon. I'll say it again. They can never have a nuclear weapon," Trump said in remarks about the attack on Saturday.

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Trump said the strikes were meant to "defend the American people by eliminating imminent threats from the Iranian regime" and that they had come after Iran had refused to abandon plans to develop nuclear capabilities.

Irvani called the attack a continuation of longstanding U.S. aggression against Iran.

"Mr. president, this morning the United States regime, jointly and in coordination with the Israeli regime, initiated an unprovoked and premeditated aggression against the Islamic Republic of Iran for the second time in recent months," Irvani said, referring to strikes the U.S. carried out against its nuclear enrichment facilities last year.

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"The president of the United States and the Prime Minister of the Israeli regime have openly claimed responsibility for this act of aggression and have explicitly articulated regime change as their objective. An unmistakable admission of their intent to violate Iran's sovereignty and territorial integrity."

U.N. Ambassador Mike Waltz pushed back on Iravani's characterizations.

"For 47 years, the Iranian regime has chanted, quote, ‘Death to America’ at every turn, at every opening, it has sought to eradicate the state of Israel. It has waged an unending campaign of bloodshed and mass murder," Waltz said.

Iravani did not address the negotiations between the U.S. and Iran on its nuclear development plans.

Ben Rhodes, a leading figure within the Obama administration who pushed for the 2015 nuclear deal with Iran, was blasted on social media Saturday after he criticized U.S. military strikes on Iran. 

In the immediate aftermath of the joint attack by the U.S. and Israel, Rhodes was posting criticism of the administration on social media saying that Trump and Netanyahu "seem to be totally unconcerned about the human beings - on all sides - who will suffer."

"Trump's second term has been the worst case scenario," Rhodes said in another X post. 

Rhodes was quickly ridiculed by many conservatives on social media who pointed to the Obama-era Iran deal as a catalyst for allowing the situation to escalate to this point and placing blame on the Obama administration for not taking the threat from Iran seriously.

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"Yes we were much better off with a president who drew redlines and failed to enforce them," American Enterprise Institute fellow and Fox News contributor Marc Thiessen posted on X. "Team Obama might want to sit this one out."

"Oh look the guy who literally created this mess in the first place has chimed in," Republican digital operative Alec Sears posted on X. 

"You were part of the team who gave billions of dollars to the Iranian Regime - you helped fund this terror on human beings," former acting Director of National Intelligence Richard Grenell posted on X. "Once again, President Trump is cleaning up your mess."

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"You had eight years to do something on this issue," Red State writer Bonchie posted on X. "Instead, you became a foreign operative doing everything you could to preserve an Islamist regime."

"You put these circumstances in place."

"The Obama crew weeps for the mullahs," former Trump campaign communications director Tim Murtaugh posted on X. 

"Ben Rhodes bears responsibility for how America got to this point," Middle East geopolitical analyst and Red Ax Strategies President Matthew Brodsky posted on X. "He is a spineless agent of influence for the regime in Iran. It's taken years to undo the damage of his foreign policy."

On Saturday afternoon, it was reported that Iranian Supreme Leader Ayatollah Ali Khamenei, who ruled the Islamic Republic for more than three decades, was killed in the strike against Iran.

Israeli leaders confirmed Khamenei's compound and offices were reduced to rubble early Saturday after a targeted strike in downtown Tehran.

"Khamenei was the contemporary Middle East’s longest-serving autocrat. He did not get to be that way by being a gambler. Khamenei was an ideologue, but one who ruthlessly pursued the preservation and protection of his ideology, often taking two steps forward and one step back," Behnam Ben Taleblu, senior director of FDD’s Iran program, told Fox News Digital.

Fox News Digital's Efrat Lachter contributed to this report.