Early on Sunday morning local time, Kuwait's defense ministry announced that an Iranian drone attack had targeted fuel tanks at the country's international airport.
US president Trump said he believes Iran is to blame for the attack on the school of Iranian girls.
As the conflict with the Iran-backed Hezbollah intensifies, dozens more people have died in Lebanon as a result with major Israeli air and ground operations.
On Saturday, Trump visited an air base in Delaware for honorable transfer of six US service members who had been killed in the fighting.
After a week of strikes, Israel and the United States had almost complete control of the skies over Tehran, according to Israeli Prime Minister Benjamin Netanyahu, who declared on Saturday that Israel would continue its fight with Iran "with all our force."