He has dismissed the charges as a political vendetta pursued by his long-time rival, al-Maliki.
Also Sunday, a provincial official said authorities have arrested a police officer in charge of a prison from which scores of inmates, including as many as 47 convicted al-Qaida militants, escaped last September with what the government has acknowledged was help from inside.
Ahmed al-Shaalan, deputy head of Salahuddin provincial council said Col. Laith al-Sagmani was arrested few days ago and was sent to Baghdad. He's accused of failure to carry out his duties during the jailbreak, al-Shaalan added.
Associated Press Writer Sameer N. Yacoub contributed to this report.