The Islamic State (IS) group destroyed Mosul's al-Nuri mosque and its iconic leaning minaret known as al-Hadba when fighters detonated explosives inside the structures yesterday night, Iraq's Ministry of Defence said.
The mosque also known as Mosul's Great Mosque is where IS leader Abu Bakr al-Baghdadi declared a so-called Islamic caliphate in 2014, shortly after the city was overrun by the militants, and was seen as a key symbolic prize in the fight for Iraq's second-largest city. The minaret that leaned like Italy's Tower of Pisa stood for more than 840 years.
In a statement posted online after the Ministry of Defence statement, IS claimed an airstrike carried out by the United States destroyed the mosque and minaret.
A coalition spokesman, US Army Col Ryan Dillon, told The Associated Press that coalition aerial surveillance confirmed the mosque was destroyed, but he said a US strike was not the cause.
IS fighters initially attempted to destroy the minaret in July 2014. The militants said the structure contradicted their fundamentalist interpretation of Islam, but Mosul residents converged on the area and formed a human chain to protect it. IS demolished dozens of historic and archaeological sites in and around Mosul, saying they promoted idolatry.
"This is a crime against the people of Mosul and all of Iraq, and is an example of why this brutal organisation must be annihilated," US Maj Gen Joseph Martin, the commander of coalition ground forces in Iraq, said in a written statement.
"The responsibility of this devastation is laid firmly at the doorstep of ISIS," he added, using an alternative acronym for the Islamic State group.
The mosque sat on the southern edge of the Old City, the last IS stronghold inside Mosul. Iraqi forces launched a push into the Old City earlier this week, but have made slow progress as the last IS fighters there are holed up with an estimated 100,000 civilians, according to the United Nations.