ISIL leader Abu Bakr al-Baghdadi rose from obscurity to lead the armed group and declare himself caliph of all Muslims.

Turkey captured a wife of Abu Bakr al-Baghdadi, its president said on Wednesday, more than a week after the Islamic State of Iraq and the Levant (ISIL or ISIS) leader killed himself during a raid by US special forces.

Al-Baghdadi was known to have four wives, the maximum number one can have under Islamic law at one time.

“The United States said Baghdadi killed himself in a tunnel. They started a communication campaign about this,” said President Recep Tayyip Erdogan.

“But I am announcing it here for the first time: We captured his wife and didn’t make a fuss like them. Similarly, we also captured his sister and brother-in-law in Syria,” he said in a speech at Ankara University. He gave no other details.

A senior Turkish official said earlier this week that Turkey had captured al-Baghdadi’s sister, her husband and daughter-in-law, and hoped to gain intelligence from them about ISIL, although Ankara has not said what knowledge they may have had about the group’s operations.

A Turkish official said the 65-year-old sister is suspected of being affiliated with ISIL and called her capture an intelligence “gold mine”.

Fahrettin Altun, Turkey’s communications director, said on Twitter. “The arrest of al-Baghdadi’s sister is yet another example of the success of our counter-terrorism operations.”

Commando raid

Up and until his death, al-Baghdadi had moved from place to place in eastern Syria amid a tightening US-led campaign against his group. He ended up in Idlib, in northwestern Syria, an area controlled by a rival armed group.

Last month, US Secretary of State Mike Pompeo said two of al-Baghdadi’s wives had also been killed at the site of the American raid.

Al-Baghdadi rose from obscurity to lead the ultra-hardline group and declare himself caliph of all Muslims, holding sway over huge areas of Iraq and Syria from 2014-2017 before ISIL’s control was wrested away by a US-led coalition.

World leaders have welcomed his death, but they and security experts warned the group, which carried out atrocities against religious minorities and horrified most Muslims, remained a security threat in Syria and beyond.

ISIL said a successor to al-Baghdadi – identified as Abu Ibrahim al-Hashemi al-Quraishi – had been appointed. A senior US official said last week that Washington was looking into the new leader to determine where he came from.