A US freelance journalist has been kidnapped in the Iraqi capital Baghdad, and one of the suspects is linked to an Iran-backed militia, Iraqi and US officials say.

Shelly Kittleson was abducted on Tuesday evening, said Al-Monitor, a news outlet for which she has contributed articles.

The Iraqi interior ministry said security forces had chased the reporter's abductors in a pursuit that resulted in one of the kidnappers' cars overturning and the arrest of one suspect.

A US state department official said an individual with ties to an Iranian-aligned militia group, Kataib Hezbollah, was detained by Iraqi authorities.

Dylan Johnson, assistant secretary of state for global public affairs, confirmed the abduction of an American journalist, without naming Kittleson.

He posted on X: "The State Department previously fulfilled our duty to warn this individual of threats against them and we will continue to coordinate with the FBI to ensure their release as quickly as possible."

It is understood that US officials had contacted Kittleson a number of times to warn of threats against her, including as late as Monday night.

The US state department said in a statement to the BBC: "Due to privacy and other considerations, we have nothing further to share at this time."

Al-Monitor, which is based in the US, said local news reports indicate Kittleson was taken near a hotel in the heart of the capital.

It added that the state department had confirmed it "is aware of Kittleson's kidnapping and working with the Iraqi government to secure her release".

Al-Monitor said it was "deeply alarmed" by her kidnapping, and called "for her safe and immediate release".

An Iraqi official confirmed to the BBC's US partner CBS that local authorities were working "at the highest level" to release Kittleson.

Her emergency contact Alex Plitsas, a CNN national security analyst, told CBS that Kittleson had been warned by the US government about a specific threat to her from Iran-backed paramilitaries.

Kataib Hezbollah was said to be plotting to kidnap or kill female journalists.

Plitsas said Kittleson had been warned that her name was on a list in Kataib Hezbollah's possession. A second source confirmed she had been told of a risk, but thought it was false information.

The interior ministry statement said in a statement translated from Arabic: "Security forces immediately launched an operation to apprehend the perpetrators, acting on precise intelligence and through intensive field operations, tracking the kidnappers' movements."

It added: "The pursuit resulted in the interception of a vehicle belonging to the kidnappers, which overturned as they attempted to escape."

The interior ministry did not identify the suspect, calling the abductors "unknown individuals".

"The Ministry affirms that efforts are ongoing to track down the remaining perpetrators and secure the release of the abducted woman, and to take due legal action against all those involved in this criminal act, in accordance with the law," it added.

Kittleson, based in Rome, Italy, has covered conflicts in Afghanistan, Iraq and Syria. According to her bio on X, she has worked for numerous publications.

The FBI, National Security Council, state department, Delta Force and the Iraqi Counter-Terrorism Service were in contact about her abduction, sources familiar told CBS.

Baghdad was once notorious for kidnappings, but abductions have decreased as the security situation in Iraq has improved in recent years. (BBC)

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