Security forces have imposed a curfew in regions in Huwaija district as police forces were combing the area for potential threats, the Baghdad Post reported Thursday.
The sources confirmed the entrances and exits of Kirkuk city were closed.
Over the past two months, Kirkuk has been a scene for armed attacks against police personnel and tribal chiefs.
Analysts say the Iran-allied IMIS Militias that supported the Iraqi army in an invasion of Kirkuk in early October were responsible for the attacks.
The invasion came after the Kurdistan Region independence referendum on Sept. 25th that won an overwhelming YES for an independent Kurdish state.