Retaking Beiji, 250 kilometers north of Baghdad, could allow Iraqi forces a base to attack neighboring Tikrit, taken by the extremists after their lightning advance this summer. It also represents a morale boost for Iraq's beleaguered security forces, which saw many of its troops flee the militant offensive.
State television quoted the top army commander in Beiji, Gen Abdul-Wahab al-Saadi, as saying troops recaptured the city's local government and police headquarters at the center of the town. It aired what appeared to be archival footage of the town showing Iraqi army troops firing their weapons from behind sand barriers.
A senior military official reached by telephone in Beiji confirmed the recapture of the city center, but added that intense clashes continued elsewhere in the town. He told The Associated Press that 75 percent of Beiji was now in the hands of government troops. He spoke on condition of anonymity because he was not authorized to speak to journalists.
Government officials in Baghdad offered no immediate comment on the reports. Al-Saadi said Saturday that his forces had recaptured most of the city and that it would soon be entirely rid of Islamic State group fighters.
Iraq's army and security forces partially have regrouped after melting away in the face of the summer's Islamic State offensive. In recent weeks, they recaptured a string of small towns and villages, but taking Beiji would be strategically significant in what is shaping up to be a drawn-out campaign against the extremists.