Iraq's Health Ministry says up to 150,000 people have died since the 2003 US-led invasion, as outgoing US defence secretary Donald Rumsfeld acknowledged the problems in fighting insurgents.
While the country's Shiite and Sunni Arabs attended weekly prayers amid a relative lull in violence, clerics from the majority Muslim sect called for the speedy execution of former dictator Saddam Hussein.
In violence on the ground, a powerful blast killed an Iraqi army colonel and his five bodyguards in the northern town of Tall Afar.
Revising its earlier estimates, the Health Ministry said that between 100,000 and 150,000 people have been killed since the invasion which toppled Saddam.
It earlier said 150,000 people had died, as reported in the media quoting Health Minister Ali al-Shamari on Thursday during a visit to Vienna.
"The minister was misquoted. He said between 100,000-150,000 people were killed in three-and-a-half years," an official with the ministry said after having initially confirmed the higher figure.
He said the victims were killed "during military confrontations, assassinations and sectarian assassinations," adding that another 70 to 80 people were dying in violence each day.
The ministry had started keeping records only since early 2004, the official noted, effectively meaning that those killed during the actual invasion and in the ensuing months were not included in this figure.