Iraqi Kurdish forces took control of the northern oil city of Kirkuk today, after government troops abandoned their posts in the face of a triumphant Sunni Islamist rebel march towards Baghdad that threatens Iraq's future as a unified state.
In Mosul, Sunni militants of the Islamic State of Iraq and the Levant (ISIL) staged a parade of American Humvees seized from the collapsing Iraqi army in the two days since the fighters drove out of the desert and overran Iraq's second biggest city.
Two helicopters, also seized by the militants, flew overhead, witnesses said, apparently the first time the militant group has obtained aircraft in years of waging insurgency on both sides of the Iraqi-Syrian frontier.
State television showed what it said was aerial footage of Iraqi aircraft firing missiles at insurgent targets in Mosul. The targets could be seen exploding in black clouds.
Further south, the fighters extended their lightning advance to towns only about an hour's drive from the capital Baghdad, where Shi'ite militia are mobilising for a potential replay of the ethnic and sectarian bloodbath of 2006-2007.
Trucks carrying Shi'ite volunteers in uniform rumbled towards the front lines to defend the capital.
The stunning advance of ISIL, which aims to build a Caliphate ruled on mediaeval Sunni Islamic principles across Syria and Iraq, is the biggest threat to Iraq since U.S. troops withdrew in 2011. Hundreds of thousands of people have fled their homes in fear as the militants seized the main cities of the Tigris valley north of Baghdad in a matter of days.
The security forces of Iraq's autonomous Kurdish north, known as the peshmerga, or those who confront death, took over bases in Kirkuk vacated by the army, a spokesman said.
"The whole of Kirkuk has fallen into the hands of peshmerga," said peshmerga spokesman Jabbar Yawar. "No Iraqi army remains in Kirkuk now."
Kurds have long dreamed of taking Kirkuk and its huge oil reserves. They regard the city, just outside their autonomous region, as their historical capital, and peshmerga units were already present in an uneasy balance with government forces.
The swift move by their highly organised security forces to seize full control demonstrates how this week's sudden advance by ISIL has redrawn Iraq's map - and potentially that of the entire Middle East.
Since Tuesday, black clad ISIL fighters who do not recognise the region's modern borders have seized Mosul and Tikrit, home town of former dictator Saddam Hussein, as well as other towns and cities north of Baghdad.
The army of the Shi'ite Prime Minister Nuri al-Maliki's government in Baghdad has essentially evaporated in the face of the onslaught, abandoning bases and U.S.-provided weapons.
The administration of U.S. President Barack Obama has come under fire for failing to do enough to shore up the government in Baghdad before pulling out its troops.
Security and police sources said Sunni militants now controlled parts of the small town of Udhaim, 90 km (60 miles) north of Baghdad, after most of the army troops left their positions and withdrew towards the nearby town of Khalis.
"We are waiting for supporting troops and we are determined not to let them take control. We are afraid that terrorists are seeking to cut the main highway that links Baghdad to the north," said a police officer in Udhaim.
OIL PRICE SURGE
The U.N. Security Council was expected to meet later on Thursday. Iraq's ambassador to France said it would call for weapons and air support.
"We need equipment, extra aviation and drones," Fareed Yasseen said on French radio. The Council "must support Iraq, because what is happening is not just a threat for Iraq but the entire region."
The global oil benchmark jumped about $2 on Thursday, as concerns mounted that the violence could disrupt supplies from the OPEC exporter. Iraq's main oil export facilities are in the largely Shi'ite areas in the south and were "very, very safe", oil minister Abdul Kareem Luaibi said.
ISIL fighters have overrun the town of Baiji, site of the main oil refinery which meets Iraq's domestic demand for fuel. Luaibi said the refinery itself was still in government hands.
In Tikrit, video footage showed dozens of members of a police special forces battalion held prisoner, paraded before a crowd by fighters who overran their base.
Militants have set up military councils to run the towns they captured, residents said.
"They came in hundreds to my town and said they are not here for blood or revenge but they seek reforms and to impose justice. They picked a retired general to run the town," said a tribal figure from the town of Alam, north of Tikrit.
"'Our final destination will be Baghdad, the decisive battle will be there,' that's what their leader of the militants' group kept repeating," the tribal figure said.
Security was stepped up in Baghdad to prevent the Sunni militants from reaching the capital, which is itself divided into Sunni and Shi'ite neighbourhoods and saw ferocious sectarian street fighting in 2006-2007 under U.S. occupation.
By midday on Thursday insurgents had not entered Samarra, the next big city in their path on the Tigris north of Baghdad.
"The situation inside Samarra is very calm today and I can't see any presence of the militants. Life is normal here," said Wisam Jamal, a government employee in the mainly Sunni city which houses a major Shi'ite pilgrimage site.