A seven-member panel chaired by former Malaysian Federal Court judge Abdul Kadir Sulaiman presided over the trial, which began last Saturday, and both Bush and Blair were tried in absentia.
"The evidence showed that the drums of wars were being beaten long before the invasion. The accused in their own memoirs have admitted their own intention to invade Iraq regardless of international law," it said.
The verdict is purely symbolic as the tribunal has no enforcement powers.
The tribunal is also expected to later hear torture and war crimes charges against seven others, including former US Secretary of Defense Donald Rumsfeld and former vice president Dick Cheney.
by Debra Sweet, National Director, World Can't Wait