"If we see any criminal acts aimed at harming our fellow citizens, there are preparations and procedures in place to make certain that such attempts fail," Interior Ministry spokesman Abdul Karim Khalaf told the BBC.

Saddam was convicted of crimes against humanity for ordering the killings of an estimated 150 Shiite Muslims in Dujail in the 1980s.

About 2,000 supporters marked Saddam's death Saturday in Amman, Jordan, and his supporters in Iraq were expected to gather Sunday in his hometown of Tikrit and at his nearby grave.

Saddam's top aides are awaiting execution for ordering chemical gas attacks against Iraqi Kurds in 1988. Among the condemned is Saddam's cousin, Ali Hassan al-Majid, known as "Chemical Ali."