"We are seeing now the last meters (yards) and then final victory will be announced", a television presenter said, citing the channel's correspondents embedded with security forces battling in the IS fortification in the Old City of Mosul, by the Tigris river.
The defeat would be the biggest yet for the Islamic State group three years since it seized Mosul in a lightning offensive, swept across much of the country's Sunni Arab heartland and proclaimed a "caliphate" straddling Iraq and Syria.
Iraqi forces backed by a USA -led coalition launched a major operation to retake the city in October 2016.
Backed by a ferocious aerial bombing campaign by a US-led worldwide coalition, the offensive has turned much of the city to rubble and forced tens of thousands of people to flee.
The doomed death cult has also been taking civilians as hostages during the eight month battle to expel them in a sinister bid to slow down advancing Iraqi troops.
"I don't want to speculate if it's today or tomorrow but I think it's going to be very soon", he added.
According to Iraqi police and army commanders, most of the foreign IS fighters still in Mosul in recent months came from Russian Federation, particularly Chechnya, and other former Soviet bloc countries, as well as various Arab states.
The disturbing situation is said to have come to light when Iraqi surveillance officers examined footage taken from the front lines.
"The end of the battle is near, I would say two days, but it could go on", said CTS commander Abdel Ghani al-Assadi.
The final push is being hindered because up to 20,000 civilians are still trapped in the area.
"The enemy has strung IEDs (improvised explosive devices) all over the place, in every place, in every closet, in one case under a crib", said Sofge.
"This fight in Mosul is not like anything modern militaries have done in our life time".
Nearly exactly three years ago, the extremist group's leader, Abu Bakr Al Baghdadi, declared from Mosul a "caliphate" over adjoining parts of Iraq and Syria.
ISIS blew up the historic site and its minaret on June 21.
Reports in Iraq indicate that government forces will announce victory in Mosul in the coming hours.
The UN has warned that IS may be holding more than 100,000 people in the city as human shields. Flalah al-Wardani, commander of the 1st Brigade of the elite Iraqi force.
The intent was political: to sew division among the local population and turn civilians against the American-backed Iraqi security forces.
Dozens of IS insurgents were killed on Saturday and others tried to escape by swimming across Tigris, state TV said. However, the security situation in Mosul remains complicated, many ISIS sleeper cells still operate in the area.