Iraq's government has endorsed plans to relocate thousands of Arabs who were moved to Kirkuk as part of Saddam Hussein's campaign to force ethnic Kurds out of the oil-rich city, in an effort to undo one of the former dictator's most enduring and hated policies.

The contentious decision was confirmed Saturday by Iraq's Sunni justice minister as he told The Associated Press he was resigning. Almost immediately, opposition politicians said they feared it would harden the violent divisions among Iraq's fractious ethnic and religious groups and possibly lead to an Iraq divided among Kurds, Sunni Arabs and Shiites.

The plan was virtually certain to anger neighboring Turkey, which fears a northward migration of Iraqi Kurds — and an exodus of Sunni Arabs — will inflame its own restive Kurdish minority.

. . . Kirkuk, an ancient city that once was part of the Ottoman Empire, has a large minority of ethnic Turks as well as Christians, Shiite and Sunni Arabs, Armenians and Assyrians. The city is just south of the Kurdish autonomous zone stretching across three provinces of northeastern Iraq.

Iraq's constitution sets an end-of-the-year deadline for a referendum on Kirkuk's status. Since Saddam's fall four years ago, thousands of Kurds who once lived in the city have resettled there. It is now believed Kurds are a majority of the population and that a referendum on attaching Kirkuk to the Kurdish autonomous zone would pass easily.