Shelly Kittleson, a freelance journalist who has worked for years in Iraq and Syria, remains missing after her abduction on Tuesday.

US Secretary of State Marco Rubio confirmed early Wednesday that American journalist Shelley Kittleson, who was kidnapped last week in Iraq, has been released.

“In recognition of the national stances of the outgoing prime minister, we have decided to release the American defendant Shelly Kittleson, on the condition that she leaves the country immediately,” A...