Iraq's intelligence forces have captured Sami Jasim, a high-ranking member of ISIS, working as in-charge of the group's finance and sought by the U.S., said Prime Minister Mustafa Al-Kadhimi on Twitter.

"While our [Iraqi security forces] heroes focused on securing the elections, their [Iraqi national intelligence services] colleagues were conducting a complex external operation to capture Sami Jasim," he said on Monday, without providing further details of the operation.

Jasim, who also served as a deputy to the slain ISIS leader Abu Bakr al-Baghdadi, was arrested "outside the borders" of Iraq, Kadhimi said.

Baghdadi was killed in a U.S. special operation in northwestern Syria in 2019. Abu Ibrahim al-Hashimi al-Qurashi, whose true identity still remains sketchy, has since taken over the helm.

Jasim is among other ISIS leaders identified by the U.S. State Department, which had offered financial incentives for information leading to their whereabouts.