Baghdad/London: Palestinians living in Iraq have been warned that they will be killed by Shiite militias unless they leave the country immediately.

Iraqi police say the immigrants, who are mostly Sunnis, are the target of a backlash by hardline Shiites, including members of the Mehdi Army led by the cleric Moqtada Al Sadr.

More than 600 Palestinians are believed to have died at the hands of Shiite militias since the war began in 2003, including at least 300 from the Baladiat area of Baghdad. Many were tortured with electric drills before they died.