Iran live updates: 1 dead, 11 injured in attack on Saudi airport, officials say

The Federal Aviation Administration has issued a warning to U.S. airlines flying to or over Saudi Arabia, saying airlines should exercise caution due to “safety-of-flight risks associated with ongoing military activities and GNSS interference.”

“Threats could pose a potential risk to aircraft at all altitudes, including during overflight, the arrival, and departure phases of flight,” the FAA notice to airmen (NOTAM) said.

The NOTAM is in place from now until Dec. 10.

FedEx flies to Riyadh, but no U.S. commercial airlines currently fly there. Delta was scheduled to launch an Atlanta-to-Riyadh route on Oct. 23, but Delta CEO Ed Bastian told CNBC that “safety is going to make the call” on whether they actually launch or not.

-ABC News' Clara McMichael

The Saudi General Authority of Civil Aviation said the attack on King Khalid International Airport in Riyadh on Sunday killed one Pakistani national and injured 11 others.

The authority said the injured were "immediately transferred to hospital to receive medical care."

The attacks also resulted in material damage, which is currently being assessed, the authority added.

-ABC News' Jamie Dorrington

The King Khalid International Airport in Riyadh, Saudi Arabia, was subject to a new attack on Sunday afternoon, according to the Saudi General Authority of Civil Aviation.

Officials said the attack resulted in injuries and assessments of the damage were ongoing in coordination with relevant authorities.

Maj. Gen. Turki Al-Maliki, spokesperson for the Saudi-led coalition in Yemen, said on social media that an "unknown projectile" had struck Passenger Hall No. 4 at King Khalid International Airport.

"A fire resulting from the attack is being directly handled by the competent authorities at the site," Al-Maliki said.

In a later post, Al-Maliki said Saudi air defenses had "destroyed a loitering (cruise) missile in the vicinity of King Khalid International Airport."

The new incident comes a day after a dozen people were killed and at least 300 were injured in an attack on King Khalid International Airport, the Saudi General Authority of Civil Aviation said. The Iran-backed Houthi rebels claimed responsibility for Saturday's attack. Secretary of State Marco Rubio confirmed that an American citizen was killed in Saturday's strike on the airport.

-ABC News' Jamie Dorrington

President Donald Trump on Saturday night told reporters that the attack on the King Khalid International Airport in Riyadh was "terrible" and that he would speak with Crown Prince Mohammed bin Salman.

“I think it's terrible,” Trump said of the attack.

Asked if the Saudis are able to defend themselves, Trump said: "Well, they're able to defend. Look, the Saudis are good fighters, but I think the attack was a terrible thing."

Later he said he had not yet spoken with bin Salman, but that he would, adding "What happened in Saudi Arabia is not acceptable."

-ABC News' Fritz Farrow