MOSUL, Iraq — Iraqi special forces entered Mosul University on Friday in their latest advance along the eastern front as they battle Islamic State militants for control of the city, according to senior Iraqi officers.

The troops entered the university grounds in the morning hours and by afternoon, they had taken control of a neighborhood on the northeastern edge of the university compound and the technical institute within the campus, according to special forces Brig. Gen. Haider Fadhil and Maj. Gen. Sami al-Aridi.

“We broke through the terrorists’ defenses and we destroyed their lines and their units and their bases,” said al-Aridi, who was overseeing the assault Friday.

The university is located in the eastern section of Mosul, Iraq’s second-largest city which is divided by the Tigris River into roughly an eastern and a western half.

Sgt. Saad Jabar said that over the past two years since IS seized Mosul in a 2014 blitz that captured much of northern and western Iraq, the militants have had time to prepare for an assault by Iraqi forces, building tunnels and getaways across the city, including on the university grounds.

“They had reinforced their positions and had plans. They knew where to come in and where to get out,” Jabar said.

The push into Mosul University came a day after Iraqi army forces north of the city linked up with troops pushing in from the city’s eastern edge. Iraqi forces have largely surrounded Mosul, but the most significant advances on the city have come from the eastern front and in the eastern half of the city. IS still controls Mosul’s west.

The university, founded in the 1960s, was one of the top educational institutions in Iraq, drawing students from all over the country and reflecting the city’s once diverse ethnic makeup. As the security situation in Mosul deteriorated following the 2003 U.S.-led invasion of Iraq, enrollments declined.