"ISIL’s head of security in Mosul, Aziz Ibrahim Faris al-Anzi, was killed today [Monday] by an airstrike near the Republican Hospital in the Al-Sihha district," Army Lieutenant-Colonel Abdul Salam al-Jubouri told Anadolu Agency. 

"Another terrorist leader, Ali Ibrahim Mohamed, was also killed Monday in clashes with anti-terrorism forces in western Mosul’s Al-Tanak neighborhood,” he said. 

"This comes one day after Abu Quhafa, leader of ISIL’s ‘services bureau’ in Mosul, was killed by [Interior Ministry-affiliated] Rapid Reaction Forces,” al-Jubouri added. 

In February, Iraqi ground forces -- backed by a U.S.-led air coalition -- began fresh operations aimed at ousting ISIL from western Mosul, the terrorist group’s last stronghold in northern Iraq.

The offensive is part of a wider campaign launched last October to retake the entire city, which ISIL overran -- along with much of northern and western Iraq -- in mid-2014.