Turkey says it has captured the sister of slain ISIS leader Abu Bakr al-Baghdadi and that her arrest is an intelligence 'gold mine'.

The 65-year-old, known as Rasmiya Awad, was found living in a trailer container with her family in Syria, a senior official said.

Awad was captured during a raid today near the town of Azaz along with her husband, daughter-in-law and five children, a Turkish official said.

“We hope to gather a trove of intelligence from Baghdadi’s sister on the inner workings of ISIS,” the official said.