In a speech accompanied by photos of alleged torture in Iraq, Mahathir exhorted global leaders to "summon the political will" to try Bush, his advisers and allies in an international court.
Mahathir, who led Malaysia for 22 years until stepping down in 2003, has frequently criticized Washington's Middle East policies, the AP reports.
During his speech, a slideshow titled "The War Criminals" showed pictures of Bush, his advisers, British Prime Minister Tony Blair, Australian leaderJohn Howard and others.
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