The last American combat troops in Iraq have left the country, the US military has said.

The 4th Stryker Brigade, 2nd Infantry Division began crossing by land into Kuwait in the early hours of the morning, said a spokesman.

Their departure comes ahead of a 31 August deadline for an end to the US combat mission in the country.

But the Pentagon has not confirmed that the move marks an early end to combat operations.

Most of the 4,000 Stryker Brigade troops drove out of Iraq in a convoy of armoured vehicles, say reports.

The journey along potentially hostile desert roads had been carefully planned for weeks.

Some of the brigade remained behind to complete logistical and administrative tasks but would leave the country by air later in the day, the Associated Press reported.

The BBC's Jane O'Brien in Washington says the brigade's departure after seven and a half years is a significant step.

But the Pentagon has stressed that the official end to Operation Iraqi Freedom - the US military mission in the country - remains scheduled for the end of the month.

Some 50,000 US troops are set to remain in Iraq until the end of 2011 to advise Iraqi forces and protect US interests.

Those soldiers will be armed but will only use their weapons in self-defence or at the request of the Iraqi government.

State Department spokesman PJ Crowley said the US involvement in Iraq was far from over, but that it would be less intrusive and more civilian focused.

"We are ending the war ... but we are not ending our work in Iraq. We have a long-term commitment to Iraq," he told MSNBC.

Mr Crowley said the US had a trillion dollar investment to protect in the country and also wanted to see a significant return on the 4,415 troops who have lost their lives in the conflict.

Source: bbc.co.uk

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