Less than 24 hours after two Iranian drones hit the U.S. Embassy in Riyadh, Saudi Arabia, fresh reports have surfaced that the Central Intelligence Agency's station in the country was also targeted.

Nonetheless, it represents a substantial victory for Iran as it strikes back at U.S. targets and personnel throughout the Middle East.

Witnesses in the Middle Eastern capital reported hearing and witnessing powerful explosions at the embassy, with casualty numbers remaining unclear.

Plumes of smoke could be seen rising from the city's diplomatic quarter, an area containing numerous foreign embassies and residences of international diplomats.

"I heard two explosions followed by smoke rising over the quarter," one local resident told AFP.

Intelligence subsequently reported by CNN revealed that two drones executed the assault, with a third drone observed in the area, though it did not appear to take part in the initial strike. The drones were later identified as Iranian.

The explosions took place during Iran's continuing campaign of missile and drone attacks against Gulf states, including Saudi Arabia, in response to earlier U.S. and Israeli air strikes.

NewsNation White House correspondent Kellie Meyer reported speaking with U.S. President Donald Trump shortly after the Riyadh embassy attack. The president told her that Americans will "find [out] soon what the retaliation will be for the attack on the U.S. Embassy in Riyadh."

Meyer also confirmed that service members were killed in the attack, though she did not specify the precise number. According to her report, the president indicated he doesn't believe deploying ground troops will be necessary.

The air strikes follow closely after a security alert issued by the U.S. Embassy in Jordan for Americans abroad, following an attack on another American consulate in the Middle East.

"Out of an abundance of caution, all personnel at the U.S. Embassy have temporarily departed the Embassy compound due to a threat," the advisory announced.

This development follows Sunday's violence in Karachi, Pakistan's port city, where authorities report at least 22 deaths and over 120 injuries as protesters attempted to storm a U.S. Consulate.

In Pakistan's northern areas, demonstrators targeted U.N. and government facilities. The unrest erupted following U.S. and Israeli strikes on Iran that led to the death of Supreme Leader Ayatollah Ali Khamenei.