Via CNBC

Iranian Supreme Leader Ayatollah Ali Khamanei makes a speech regarding Trump’s withdrawal decision from Iran nuclear deal during a press conference in Tehran, Iran on May 09, 2018.

Iranian Leader’s Press Office | Handout | Anadolu Agency | Getty Images

Iran’s supreme leader Ayatollah Ali Khamenei said Friday that Tehran’s decision to attack military bases housing U.S. troops in Iraq earlier this month was a “day of God.”

The 80-year-old said the U.S. showed its terrorist nature in killing the former Quds Force commander Qasem Soleimani, according to a Reuters translation, before adding the “assassination” was a disgrace to President Donald Trump’s administration.

His comments came as he led Friday prayers for the first time in eight years.

The Islamic Republic is currently grappling with elevated U.S.-Iran tensions since the death of Soleimani and widespread protests following the accidental downing of a passenger jet that killed all 176 people on board — the majority of whom were Iranian citizens.

Many of those taking part in the rallies have called for the country’s top leaders to resign.

Iran’s government admitted to the accidental downing of the Ukrainian International Airlines passenger jet on Jan. 11, after days of denying a role in the crash.

Delivering the weekly sermon for the first time since 2012, Khamenei said U.S. sanctions imposed over a dispute on its nuclear program would not make Tehran yield.

Elevated tensions

Iran’s Soleimani was killed in a U.S. drone strike on Jan. 3. It marked the most dramatic escalation between Washington and Tehran in a series of tit-for-tat attacks. Western forces and embassies in the region have been on high alert since then.

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The attack prompted Iran to retaliate by launching more than a dozen ballistic missiles at the Ain al-Asad airbase in Iraq’s western Anbar province and a base in Irbil in the country’s north.

No U.S. service members were killed in the attack but several were treated for concussions, the Pentagon said in a statement earlier this week.

In a televised address after Iran fired missiles at the air bases in Iraq, Trump said Tehran appeared to be “standing down” following an initial spike in tensions.

The Trump administration has claimed its decision to kill Soleimani was taken in part because he was “actively developing plans to attack American diplomats and service members in Iraq and throughout the region.”

Iranian President Hassan Rouhani lashed out at the U.S. and Europe on Wednesday, criticizing their military presence in the Middle East during an angry speech on state television.

Rouhani said U.S. troops were currently “insecure” in the Middle East, according to a Reuters translation, before adding EU troops might also be in danger. It was the first time he had directed a threat toward European forces in the region.

— CNBC’s Natasha Turak contributed to this report.