Suicide bomb attack kills six troops in Iraq -1731 troops killed since the US-led invasion of Iraq.
Since Jaafari's government was formed in April, violence has increased.
More than 1,000 Iraqis have been killed in guerrilla attacks and sabotage goes on unabated. A major oil pipeline was attacked on Thursday and a blast on a water pumping station left half of Baghdad without water earlier this week.
A contract dispute between the Iraqi government and a British security company that protects Baghdad airport blew up on Friday. The firm went on strike and civil aviation at the airport had to be shut down.
The Shi'ite-led government is trying to find ways to draw the minority Sunni Arabs, who form the core of the insurgency, fully into the political process and end the violence.
But one of Iraq's most powerful Shi'ite leaders, Abdul Aziz al-Hakim, ruled out dialogue with insurgents who, he said, had declared all-out war on his community and "must be terminated."
"The terrorist groups have revealed their purpose, which is creating sectarian strife, and stand in the way of the political process and building the new Iraq," said Hakim, a day after two waves of car bombs killed more than 30 people in mainly Shi'ite neighborhoods of the capital.
Bush Says No Timetable for Iraq Withdrawal - 1/4 of Iraq's government wants the US to leave
Majority of Americans Think the Iraq War Is a Mistake - a mistake that is costing lives.
US Caused More Deaths in Iraq than Saddam
With two wars and 13 years of criminal sanctions, the United States have been responsible for more deaths in Iraq than Saddam Hussein," Larry Everest, a journalist, told hundreds of anti-war activists gathered in Istanbul.
Founded in 2003, the WTI is modelled on the 1960s Russell Tribunal, created by the British philosopher Bertrand Russell to denounce the war in Vietnam. It has held about 20 sessions so far in different locations around the world.
A symbolic verdict was to be handed down on Monday by the 14 "jurors of conscience" -- including the militant Indian novelist Arundhati Roy, winner of the 1997 Booker Prize for "The God of Small Things."
The tribunal has for the past two years been gathering what it says is evidence that the war launched in March 2003 to oust Saddam was illegal, and it has also been gathering evidence of exactions allegedly committed by coalition troops.
Its verdict on Monday after its final session is expected to condemn both the United States and Britain.
Monthly Car Bomb Numbers
480 car bombs since June 28, 2004
Here is a month by month tally of these incidents, deaths, and injuries:
_June 28-30, 2004: 2 car bombs; 9 killed; 2 wounded.
_July 2004: 11 car bombs; 139 killed; 303 wounded.
_August 2004: 12 car bombs; 44 killed; 175 wounded.
_September 2004: 26 car bombs; 202 killed; 667 wounded.
_October 2004: 43 car bombs; 149 killed; 392 wounded.
_November 2004: 48 car bombs; 165 killed; 414 wounded.
_December 2004: 27 car bombs; 196 killed; 424 wounded.
_January 2005: 43 car bombs; 237 killed; 420 wounded.
_February 2005: 30 car bombs; 252 killed; 339 wounded.
_March 2005: 36 car bombs; 98 killed; 281 wounded.
_April 2005: 65 car bombs; 173 killed; 568 wounded.
_May 2005: 77 car bombs; 317 killed; 896 wounded.
_June 1-23, 2005: 60 car bombs; 193 killed; 639 wounded.