One U.S. civilian contractor was killed Friday in a rocket attack on an Iraqi military base in Kirkuk, according to the American military.

The attack on the K1 military base, which houses U.S. and anti-Daesh coalition forces, also injured several U.S. service members and Iraqi personnel.

The incident took place at 7.20 p.m. Iraqi local time.

“Iraqi Security Forces are leading the response and investigation,” the military said a statement.

No group has claimed responsibility for the attack.

Read more: US civilian contractor killed in Iraq rocket attack