World Bulletin / News Desk
Ali Huseyni said rounds of shells struck several districts in the city.
"There was no loss of life, but there was major damage to houses," Huseyni said.
No group has claimed responsibility for the attacks.
Tuz Khurmatu is a predominantly Turkmen city in the northern Saladin province that was retaken by Iraqi forces in October following the withdrawal of Kurdish Peshmerga forces amid tension over a controversial referendum on Kurdish regional independence. The city had experienced similar mortar attacks last year.
Huseyni called on the Iraqi central government to launch a security operation in the area to prevent similar attacks.
"The presence of some separatist armed groups in the south-east of the province poses a threat to civilian population," he warned.
Last month, two children were killed and seven people injured in a mortar attack in the city.