Iraqi security forces have been facing mounting pressure after a January 21 attack in central Baghdad that killed 32 people.
Iraq's premier says the military have killed a man identified as the top Daesh group figure in the country, a week after an attack by the group killed more than 30 people in Baghdad.
Prime Minister Mustafa al Kadhimi said Daesh's Iraq "wali", or governor, Abu Yasser al Issawi, was killed in an "intelligence-led operation" by Iraqi security forces.
"We promised and fulfilled. I gave my word to pursue Daesh (IS) terrorists, we gave them a thundering response," Kadhimi wrote on Twitter.
Iraq declared Daesh territorially defeated in late 2017 after a three-year fight aided by US-led coalition air strikes and military advisors.
Since then, Daesh attacks in urban areas have dramatically dropped, but Iraqi troops have continued to battle sleeper cells in the country's mountainous and desert areas.
Most senior Daesh official
Issawi, born Jabbar al Issawi in Iraq's western region of Fallujah, had been identified last year by top experts as the country's most senior Daesh official.
He rose to that rank after fighting with the militant faction in both Iraq and neighbouring Syria, senior security sources told AFP.
Issawi was killed on Wednesday in a remote swathe of Iraq's northern Kirkuk province in an operation backed by the US-led coalition, the sources added.
"The coalition carried out five air raids, killing at least 10 jihadists," one of the sources said.
A coalition spokesman did not immediately respond to AFP's request for comment.
"If this is indeed confirmed, it's significant news, al Issawi headed up IS's entire Iraq operation," tweeted Charles Lister, a director at the Middle East Institute think tank in Washington.
#pt: As the great @hushamalhashimi illustrated, al-Issawi was #ISIS's #Iraq wali, answering directly to the Delegated Committee, which itself answers to #ISIS leader Abu Ibrahim.— Charles Lister (@Charles_Lister) January 28, 2021
(H/T @CalibreObscura) pic.twitter.com/L9lcqFTLYM
The coalition has continued to provide training, surveillance and air support but has drawn down its numbers as Iraqi forces take the lead on operations.
On January 21, two suicide bombers targeted a packed open-air market in Baghdad, killing at least 32 people and wounding more than 100 others.
The attack was later claimed by Daesh.
Iraqi and Western military sources described "gaps" in the security infrastructure that may have been exploited by the attackers.
READ MORE: Why suicides have spiked in Iraq