Prime Minister Nouri al-Maliki is ready to concede, at least temporarily, the loss of much of Iraq to Sunni insurgents and is instead deploying the military's best-trained and equipped troops to defend Baghdad, the Associated Press reported, citing Iraqi officials.

Shiite militias responding to a call to arms by Iraq's top cleric are also focused on protecting the capital and Shiite shrines, while Kurdish fighters have grabbed a long-coveted oil-rich city outside their self-ruled territory, ostensibly to defend it from the al Qaeda breakaway group.

"We are facing a new reality and a new Iraq," the top Kurdish leader, Massoud Barzani, told U.S. Secretary of State John Kerry on Tuesday in Irbil, capital of the self-ruled Kurdish region in northern Iraq.

Two weeks after a series of disastrous battlefield setbacks in the north and west, al-Maliki is struggling to devise an effective strategy to repel the relentless advances by militants of the Islamic State of Iraq and the Levant, a well-trained and mobile force thought to have some 10,000 fighters inside Iraq. The response by government forces has so far been far short of a counteroffensive, restricted mostly to areas where Shiites are in danger of falling prey to the Sunni extremists or around a major Shiite shrine north of Baghdad.

These weaknesses were highlighted when the government tried but failed to retake Tal Afar, a mixed Shiite-Sunni city of some 200,000 that sits strategically near the Syrian border. The government claimed it had retaken parts of the city but the area remains under the control of the militants after a battle in which some 30 volunteers and troops were killed, the AP says.

The military's best-trained and equipped forces have been deployed to bolster Baghdad's defenses, aided by U.S. intelligence on the militants' movements, according to the Iraqi officials, who are close to al-Maliki's inner circle and spoke on condition of anonymity to discuss such sensitive issues.

The number of troops normally deployed in Baghdad has doubled, they said, but declined to give a figure. Significant numbers are defending the Green Zone, the sprawling area on the west bank of the Tigris River that is home to al-Maliki's office, as well as the U.S. embassy.

The Pentagon said Tuesday, June 24, that nearly half of the roughly 300 U.S. advisers and special operations forces are now on the ground in Baghdad, where they have begun to assess the Iraqi forces and the fight against Sunni militants. Another four teams of special forces will arrive in days, bringing the total to nearly 200.