Iran's supreme leader said President Donald Trump is a "clown" who only pretends to support the Iranian people but will "push a poisonous dagger" into their backs, as he struck a defiant tone in his first Friday sermon in Tehran in eight years.

Iran's supreme leader will deliver a Friday sermon in Tehran for the first time since 2012, as the Islamic Republic grapples with the fallout from the targeted killing of its top general in a U.S. airstrike and popular anger at its accidental shootdown of a passenger plane.

Iran's president said Thursday that there is "no limit" to the country's enrichment of uranium following its decision to abandon its commitments under the 2015 nuclear deal in response to the killing of its top general in a U.S. airstrike.

The United States on Tuesday warned of threats to commercial vessels in and around the Persian Gulf in the wake of its confrontation with Iran.

Rose McGowan's tweet that apologized on behalf of the U.S. to Iran for "disrespecting their flag and people" in the wake of an airstrike that killed the country's top general was not anti-American, the actress said in the face of harsh criticism.