Israel launched an attack on Iran's capital early Friday, with explosions reported across Tehran.
According to Israeli officials, the strikes targeted key nuclear and military facilities.
The Israeli attack follows escalating tensions over Iran's rapidly advancing nuclear program.
Flights suspended from Tehran's main international airport
Iran has suspended flights at Imam Khomeini International Airport, the country's main airport, state TV said, citing the airport's public relations department.
This comes after Israel launched strikes against Iran's nuclear program, including several in the capital Tehran.
Iran's Revolutionary Guards commander 'feared dead'
The commander of Iran's paramilitary Revolutionary Guards has been killed, according to media reports on Friday.
Iranian state television said Hossein Salami is "feared dead."
The Revolutionary Guards are one of the most powerful and feared organizations in Iran.
Hossein Salami was on the sanctions lists of several countries, including Australia, Switzerland, the European Union and the United Kingdom, according to the open-source sanctions data base, Open Sanctions.
Iran's state broadcaster added that one other top Guard official, as well as two nuclear scientists, were also believed to have been killed.
On Thursday, Hossein Salami had warned that Iran's retaliation to any Israeli aggression would be "more forceful and destructive" than in the past.
US not involved in Israeli strikes: Rubio
US Secretary of State Marco Rubio said on Thursday that the United States was not involved in Israel's strikes against Iran.
He also issued a warning to Tehran, urging it not to retaliate by targeting US personnel or assets in the region.
"Tonight, Israel took unilateral action against Iran. We are not involved in strikes against Iran," Rubio said in a statement.
"Let me be clear: Iran should not target US interests or personnel," he added.
This came after President Donald Trump warned of a possible "massive conflict" in the region and US personnel were being moved out of the Middle East due to heightened regional tensions.
"Well, they are being moved out because it could be a dangerous place," Trump told reporters in Washington on Wednesday.