Eight security operations were carried out Monday night and Tuesday morning, Diyala police chief Maj. Gen. Jameel al-Shammary told Islam Times.
"The police, with army support, carried out operations targeting ISIL strongholds in Himreen, al-Meqdadiya, al-Saadiya and al-Khalis, north and northeast of Baqubah," he said.
Five prominent ISIL members were among those killed, including an ISIL element named Abu Momen al-Ansari, he said, along with one foreign fighter "who we are now working to identify".
The security forces also arrested three other gunmen and seized weapons and equipment, he said.
A number of security personnel also were killed or wounded, he said.