Initial reports claim 14 rockets were launched with a US base in northern Iraq as target. Of the rockets fired, 4 purportedly hit US base grounds and 10 others landed outside the compound.
The US coalition in Iraq confirmed that among those wounded there was a US service member.
Spokesman for Operation Inherent Resolve (OIR) Col Wayne Marotto gave an update on his Twitter account.
He wrote: “Initial reports that Indirect Fire landed on Coalition Forces in Erbil tonight.
“There was 1 civilian contractor killed, 5 civilian contractors injured and 1 US service member injured. More information to follow.”
Masrour Barzani, prime minister of the Kurdish region of northern Iraq, issued a statement condemning the violence.
He added he had ordered the security services to launch a probe into the attack.
Mr Barzani confirmed he had consulted Iraqi Prime Minister Mustafa al-Kadhimi “on ways to cooperate and identify the outlaws behind this terror attack”.
He wrote in a tweet: “I condemn in the strongest terms tonight’s rocket attacks on Erbil.
“I urge all Kurdistanis to remain calm.