In Kirkuk province, three soldiers were killed and five others injured when unidentified gunmen attacked an army checkpoint in Safra village, Anadolu Agency reported.
Separately, gunmen attacked members of the pro-government Al-Sahwa militia near the village of Shamsiya in southern Kirkuk, killing two of them, officials said.
A local leader of the Islamic State of Iraq and Levant and three of his colleagues were killed in a security operation in the Saladin province, a military official said.
"A joint army-police force carried out an operation late Sunday during which the ISIL leader in Suleiman Beik and three companions were killed in a gunfight," Abdel-Amir al-Zaidi of the army-run Tigris Operations Command told Anadolu Agency.
Notable deaths of 2014 [PHOTOS]