A volley of rockets targeting an airbase in Iraq's Kurdistan region late on Monday killed a foreign civilian contractor and wounded five others and a US soldier, the US-led coalition said.
The attack was the first time Western military or diplomatic installations have been targeted in Iraq in nearly two months, after a string of such incidents.
Under former US President Donald Trump, Washington had vowed that the killing of an American national in such a rocket attack would prompt a mass bombing campaign in Iraq, although Iraqi officials are unsure if the Biden administration would stick to the policy.
At around 9:30 pm, a reporter heard several loud explosions in the northwestern outskirts of Arbil, the capital of Iraq's autonomous Kurdistan region.
Iraqi and Western security sources told reporters that at least three rockets were fired in the direction of the city's airport, where foreign troops are based as part of an international alliance fighting the Islamic State group.
Coalition spokesman Colonel Wayne Marotto confirmed to AFP that the dead contractor was not Iraqi, but could not give immediate details on the victim's nationality.
Two other rockets hit residential neighborhoods on Arbil's outskirts.
Delevan Jalal, the head of Arbil's health directorate, told AFP at least five civilians were wounded and one was in critical condition.
In a statement, the Kurdistan region's interior ministry confirmed "several rockets" had hit the city and said security agencies had launched a "detailed investigation", urging civilians to stay home until further notice.
Following the attack, security forces deployed around the airport and helicopters could be heard on the city's edges, an AFP correspondent said.
"Dangerous escalation"
Iraqi President Barham Saleh tweeted that the attack marked a "dangerous escalation and a criminal terrorist act".
Masrour Barzani, prime minister of the autonomous Kurdish region, condemned the attack "in the strongest terms".
He said he had spoken to Iraqi Prime Minister Mustafa al-Kadhemi so that security forces based in Arbil and Baghdad could cooperate on the investigation.
Two intelligence sources confirmed to AFP that the attack was carried out from within the autonomous Kurdish region.
Another US official said the projectiles were 107 mm rockets, fired around five miles west of Arbil.
The attack was claimed online by a shadowy group calling itself "Awliyaa al-Dam," or "Guardians of Blood."
Around a dozen, such groups have cropped up in the last year claiming rocket attacks, but the US and Iraqi security officials have told AFP they believe them to be front groups for prominent pro-Iran factions including Kataeb Hezbollah and Asaib Ahl al-Haq.
Both groups are vehemently opposed to the US-led coalition, deployed in Iraq since 2014 to help local forces beat back the Islamic State group.
Western military and diplomatic sites have been targeted by dozens of rockets and roadside bombs since the autumn of 2019, with both foreign and Iraqi personnel killed.
