Iraqi Kurdish security officials said that a drone attack targeted near US forces stationed at Erbil International Airport in northern Iraq.
The internal security service of the autonomous Kurdistan region of Iraq initially said three missiles landed near the airport on Saturday.
A statement by the Kurdish counter-terrorism force said the attack was carried out by drones loaded with explosives, while witnesses said they heard at least six explosions in the area.
There were no immediate reports of injuries.
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Erbil airport has been attacked several times in the past year, including by drones carrying explosives.
US officials blame previous attacks on Iran-aligned Shiite militias, who vowed to keep the fight going until the remaining US troops leave the country, estimated at 2,500.
US forces lead an international coalition whose mission is to help Iraqi forces fight the remnants of the radical group ISIS.