Mosul, 400 km north of Iraq's capital Baghdad, has been under IS control since June 2014, when government forces abandoned their weapons and fled, enabling IS militants to take control of parts of Iraq's northern and western regions.
Meanwhile, the spokesman for Iraq's Joint Operations Command (JOC), Brigadier General Yahya Rasool, said Daesh terrorists were now in control of only nine percent of the territories in western Mosul.
"The final push by Iraqi security forces to retake Mosul from (IS) has caused possibly the largest wave of displacement since the beginning of the year", the Norwegian Refugee Council (NRC) said.
A child cries after fleeing from her Islamic State-held neighborhood of Islah al-Zarai as special forces entered the district in western Mosul, Iraq, Thursday, May 11, 2017.
At the same time, the army's ninth division and the Interior Ministry's elite Emergency Response Division attacked the ISIL bastion of 17 Tammouz.
The paramilitary units fought sporadic clashes against IS militants and killed 23 of them, including five suicide bombers and two snipers, along with destroying four auto bombs, while the helicopter gunships destroyed a fifth booby-trapped vehicle and three IS posts, the statement added.
Hashd Sha'abi fighters also recaptured Tal Ezzo, Tal Ha'et, Mohamed Zeid, Hozeil and Tal Banat villages in Qirwan west of Mosul and near the border with Syria following intense clashes with Daesh Takfiris. Many local people have been killed under heavy bombardment and vital supplies are scarce, with some civilians being forced to eat weeds in order to survive.
The Iraqi armed troops have been involved in the offensive aimed at liberation of Mosul since October 2016.
In March, the USA acknowledged its forces launched an airstrike in western Mosul earlier that month that witnesses tell the AP killed more than 100 people.
According to OCHA, about 30,000 civilians have returned to their homes in western Mosul since the end of April - meaning that the number of internally displaced people from western Mosul stands at 403,490 people.
As hundreds of thousands of civilians are still in Mosul, anti-ISIL forces have had to limit their use of aerial attacks and artillery in the city.