ISIS commanders have been killed after one of the group's suicide bombers blew himself up at a meeting following the terrorists' collapse in Mosul.

The jihadi detonated explosives during a meeting in Qaim District in the west of the Anbar Province and the blast killed a number of leaders as well as himself.

It comes as Islamic State lost more ground in their last major stronghold in Iraq with the terror group's numbers depleted and confined to an area of about a square kilometre in the Old City.

MOSUL, IRAQ -JUNE 23: An Iraqi man collapses after fleeing the Islamic State controlled Old City of west Mosul where heavy fighting continues on June 23, 2017. Iraqi forces continue to encounter stiff resistance with improvised explosive devices, car bombs, heavy mortar fire and snipers hampering their advance

Two Cubs of the Caliphate shoot dead two prisoners. The branch was set up to recruit children to act as suicide bombers for ISIS

Lieutenant Colonel Salam al-Obeidi said that he believes only 'a few hundred Daesh fighters', an Arabic acronym for Islamic State group jihadists, are left in the Old City.

Three years after overrunning Mosul and making it the de facto Iraqi capital of the 'caliphate' they proclaimed, the jihadists now only control about a square kilometre in the city, commanders said.

There have been 80 suicide bombings by ISIS in the past four days, according to the BBC, and with the terror group facing extinction in Mosul, it appears their motive has now turned to taking as many casualties as they can with them.

ISIS burns one of its kid jihadis for refusing to kill his family ISIS terrorists burned one of its own child jihadis after he refused to kill his family. The boy, who was part of the Cubs of the Caliphate, was killed in the area of Mutaibaija near Tikrit. A local source in Salahuddin Province told Alsumaria News the desperate jihadis had taken to attacking their own families if they did not approve of ISIS' radical ideologies. The Cubs of the Caliphate was formed to recruit children to be used as suicide bombers. Advertisement

Lieutenant Colonel Mohammed al-Tamim said: 'Daesh members don't turn themselves in.

'And if they don't get killed, their last option is to blow themselves up and commit suicide.'

The most recent attack, which targeted the terror group's own hierarchy, happened near the Iraqi-Syrian border, according to Iraqi News.

Anbar Province, where the jihadi blew himself up, is still under ISIS control, but a huge offensive is underway to liberate the area.

ISIS fighters have tried repeatedly to slow down the advance of Iraqi forces with suicide attacks.

Rubble from what used to be roofs or facades damaged in the fierce fighting litters the narrow streets, sometimes piled several metres (feet) high.

A soldier who took part in the battle to retake Faruq says air strikes were an important factor because armoured vehicles were unable to be squeezed into the alleyways.

'We advance and determine where enemies are, then we call for air strikes to eliminate them, (and) then we advance, cautiously,' said a soldier who did not wish to be identified.

'We see lots of dead bodies. We're searching for the others' who are still alive, he said of the ISIS fighters.'