ARBIL -  Iraqi forces on Saturday retook Mosul's university from the Islamic State militant group, the latest key advance in efforts to recapture the eastern side of the city, officers said.

"We can say that the university has been liberated," Maan Saadi, a major general in the Counter-Terrorism Service (CTS), told AFP.

The vast Mosul University campus, one of the biggest in Iraq, lies in the north of the city on the east bank of the Tigris River that splits Mosul in two.

"We have done the hardest part... we may recapture the entirety of the eastern side in the next 10 days or so," Saadi said.

The top CTS commander, General Taleb Sheghati al-Kenani, spoke to state-run Iraqiya TV from the university.

Saadi estimated Iraqi forces had now recaptured 85 percent of the eastern side since the October 17 launch of a huge offensive to retake Mosul, the militants' main stronghold in the country.

The initial phase of the offensive saw a variety of forces retake significant swathes of land in little time but the going has been tough inside the city itself.

After a lull in operations, the CTS and other forces stepped up their coordination and, with increased air and advisory support from a US-led coalition, launched a fresh push just before the New Year.

Over the past two weeks, Iraqi forces have overrun several districts and reached the Tigris River.

The destruction of all bridges over the river in air strikes has made it difficult for IS fighters in east Mosul to resupply or escape to the west bank, which they still fully control.

The western side of Mosul, which is home to the old city and some of the militants' traditional bastions, was always tipped as likely to offer the most resistance.

An air raid during the week targeting a senior IS militant killed up to 30 people, residents said late on Friday.

CTS forces battled IS fighters at the university on Saturday in a second day of clashes there.

"There are still clashes. We entered the university and cleared the technical institute, dentistry and antiquities departments," Lieutenant General Abdelwahab al-Saadi of the CTS told a Reuters reporter in the complex.

"In the coming hours it will be liberated completely," he said. CTS troops had gathered in the university canteen. As they unfurled a map of the area, a suspected Islamic State drone flew overhead and they shot at it.

The Iraqi forces also found chemical substances IS had used to try to make weapons, CTS commander Sami al-Aridhi said. The United Nations says the militants seized nuclear materials used for scientific research from the university when they overran Mosul and vast areas of northern Iraq and eastern Syria in 2014.

Islamic State fighters have used chemical agents including mustard gas in a number of attacks in Iraq and Syria, US officials, rights groups and residents say.



Seizing the university would be a crucial strategic gain and allow Iraqi forces to advance more quickly towards the Tigris in the city's northeast, military officials have said.

Parallel advances in the southeast of the city on Saturday, led by elite rapid response units, put Iraq's federal police in control of large areas along the river bank, a spokesman said.

"The Yarimja area ... has been liberated, a large number of Daesh (Islamic State) elements were killed, and the rest fled to the right-hand side (western bank)," Lieutenant Colonel Abdel Amir al-Mohammedawi told Reuters.

Forces had stopped suicide car bomb attacks by firing at them during their advance, and the federal police also captured a field hospital the militants had been using, he said.

The federal police forces were backed by the Iraqi army's 9th armoured division and by US coalition air support, Mohammedawi said.

A separate military statement said the federal police in the area also captured a highway linking Mosul to the city of Kirkuk, to the southeast.

Improved coordination between different military branches, plus new tactics and better defences against the car bombs has helped them gain new momentum against Islamic State in Mosul since the turn of the year, US and Iraqi military officials say.

Lieutenant General Talib Shaghati told state television the entire eastern bank of the Tigris would soon be under Iraqi control. "Hopefully today we will celebrate the end of Daesh," he added.

Advances had slowed in late November and December as troops became bogged down in tough urban warfare after entering the city itself, and Islamic State fought from densely-populated residential areas.

An air raid targeting a senior Islamic State militant on Thursday killed up to 30 people in a western Mosul district, residents said. It was not immediately clear if the strike was carried out by Iraqi forces or the US-led coalition.

Iraq Body Count (IBC), a group run by academics and peace activists that has been counting violent deaths in the country since 2003, said 21 to 25 civilians had died that day in a strike on that area.

Reuters could not independently verify the reports.

Iraqi forces have tried to avoid causing civilian casualties while Islamic State has deliberately shelled and shot at residents.

The United Nations said recently the number of casualties being rushed to hospitals in nearby cities had increased.