The bombing happened at a checkpoint at the southern entrance of the city, located about 110 kilometers north of Baghdad. Three military vehicles were also destroyed during the attack, the officials said.
Information on who was responsible for the attack wasn't immediately available.
Indian nurses freed
The 46 Indian nurses being held in ISIS controlled areas in northern Iraq have been freed, the spokesman for the Ministry of External Affairs told reporters in New Delhi on Saturday.
A flight was taking the nurses from Irbil to the southwestern Indian coastal city of Kochi, he said.
The news of the release of the nurses comes a day after the ministry spokesman announcement they were being moved from Tikrit to another location under ISIS control.
ISF claims control of Saddam's birthplace
Iraq's security forces on Friday seized control of the northern town of Awja, the birthplace of Saddam Hussein, authorities told CNN.
The town is about 20 kilometers south of Tikrit, where Iraqi forces have been battling ISIS fighters for control.
The ISF offensive began in the early hours of Friday morning, when hundreds of soldiers backed by helicopters, surrounded the town and took control, police officials told CNN.
CNN cannot independently confirm the claims.