Islamic State fighters have destroyed the Grand Nouri mosque in Mosul The Iraqi military reported "ISIS terrorist gangs" blew up the mosque The mosque is where ISIS leader, Abu Bakr al-Baghdadi declared himself leader of the Islamic caliphate in 2014 Iraqi prime minister Haider al-Abadi said the destruction of the Grand Nouri mosque is an admission by the militants that they are losing the fight for Mosul. Haider al-Abadi