A woman who said she was the ex-wife of the leader of the Islamic State spoke to a Swedish newspaper about their marriage in an interview published on Thursday, but experts and officials expressed doubt that she was ever married to the self-styled caliph of the terror group.

The woman, Saja al-Dulaimi, 28, told the newspaper, Expressen, that she married Abu Bakr al-Baghdadi in 2008 after her first husband, a bodyguard for Saddam Hussein, was killed fighting American troops during the United States occupation of Iraq. The newspaper spelled her name “Saga,” although most press reports refer to her as “Saja.”

By her account a relative arranged for her to marry a man she described as a university lecturer and “normal person” who went by the name Hisham Mohamed, but the union was short-lived. She left him three months after the wedding because he had not told his first wife that he was marrying a second, she said. She claimed to have had a daughter by Mr. Baghdadi but told the newspaper she had not spoken to him since 2009.

The interview appeared to have been the first Ms. Dulaimi had ever done, but her name has been in the news before in recent years, along with her claim to have once been wed to the world’s most wanted terrorist. The veracity of her story has always been unclear.