Saudi officials have blamed the Iranian-backed group for a number of attacks.
President Donald Trump announced "major combat operations" against Iran on Feb. 28, with massive joint U.S.-Israeli strikes targeting military, government and infrastructure sites.
Despite a memorandum of understanding signed by both countries in June aimed at ending the war, talks broke down and the U.S. and Iran renewed strikes, with the strategic Strait of Hormuz as the primary flashpoint.
Across the region, fighting in Yemen between the Iranian-backed Houthis and Saudi-backed Yemeni forces has intensified in recent weeks and the militia group has also launched strikes on Saudi Arabia.
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
U.S. Central Command said it disabled a commercial cargo vessel in the Gulf of Oman after the ship’s crew "ignored repeated warnings and attempted to run the ongoing naval blockade against Iran" on Saturday.
"A U.S. military fighter jet struck the stern of Panama-flagged M/V Ocean Molica (also known as the “Arika Sun”) with a precision munition, fully disabling the ship’s propulsion without harming the crew," CENTCOM said in a statement posted on social media.
