Mohammed Hamza al-Zubeidi, commander of one of Iraq's military districts, was arrested by the troops of free Iraq in Hila, a town 90 kilometers south of Baghdad, announced a spokesman for the Iraqi National Conference party.
Al-Zubeidi is number 18 on the list of wanted Iraqi officials.
Although a Shiite himself, al-Zubeidi played a key part in the suppression of the Shiite uprising in March 1991. After that, he was the country's prime minister until the post went to Saddam Hussein in 1992.
He was a member of the Revolutionary Command Council and the commander of the Central Euphrates military district, but has not been in power for two years.
Russian officials have repeatedly declared that Israeli aviation poses a threat to the Russian military in Syria.