US Defence Secretary Donald Rumfeld on Tuesday approved of a proposal by Iraq and US military commanders to increase the size of the Iraqi security forces beyond 325,000 and accelerate their training.
Rumsfeld would not say how many more Iraqi security forces will be added to a force that now stands at about 310,000 and had been slated to grow to 325,000.
CBS News reported on Monday that General George Casey, the commander of US forces in Iraq, was expected to recommend an increase in the size of the Iraqi force of up to 100,000 troops.
The proposal comes amid rising sectarian and insurgence violence that has forced the United States to maintain more troops than planned in Iraq to bolster Iraq's troubled security forces.
Rumsfeld said the proposals were made by the Iraqi government and Casey along with Lieutenant General Martin Dempsey, the US general in charge of training the Iraqi security forces.
"I am very comfortable with the increases they have proposed and the acceleration in achieving some of those targets that they have proposed," Rumsfeld told reporters. "And I understand that the Iraqi government is as well."
"Therefore now it is simply a matter of our pressing forward and getting our portion of the budget up to Congress and working to see that it is executed," he said.
US strategy has long relied on standing up Iraqi forces to take over security duties from US and coalition troops, but the levels of violence and US and Iraqi casualties have continued to climb despite rising numbers of Iraqis in uniform.
US troop levels in Iraq this week hit 150,000, the highest it has been since January when the US force was beefed up for the Iraqi elections.
Iraqi Prime Minister Nuri Al-Maliki has complained bitterly that Iraqi security forces are not well enough equipped and has pressed for direct control over Iraqi forces.
Asserting his authority as commander-in-chief, Maliki on Monday ordered the military to pull down a cordon around Sadr City, a stronghold of a militia loyal to radical Moqtada al-Sadr.
US and Iraqi troops had sealed off the area during a search for a missing Iraqi-American service member who was reported to have been kidnapped by the militia.
Rumsfeld said he had seen the reports but would not comment on the situation except to say the Iraqi government had a difficult job.