Afghan, British and US troops were fighting in a major operation yesterday to capture the Taliban's biggest stronghold in Afghanistan.

Musa Qala in the southern province of Helmand is the only sizeable Afghan town controlled by the Taliban. Capturing Musa Qala would give Afghan government and foreign troops a big boost as the harsh winter and perennial lull in fighting sets in.

US troops were taken close to the town by helicopter on Friday to begin the attack as British troops moved in by land.

"We are now involved in an advance that is effectively kicking the door in to Musa Qala," said Lieutenant Colonel Richard Eaton, British forces' spokesman in Helmand.

Afghan army units followed up the assault on several hundred rebels in and around the town.

Twelve insurgents and two children had been killed in the assault, Afghan Defence Ministry spokesman Zahir Azimi told a news conference. Between 200 to 300 civilians had fled the area after they were informed in advance of the operation, he said.

US-led coalition force said a "precision-guided munitions strike" had killed several Taliban insurgents including a militant commander in Musa Qala on Friday.

Afghan President Hamid Karzai said Musa Qala residents had requested government forces eject the Taliban.

British troops pulled out of Musa Qala in October last year after coming under Taliban attack in a truce criticised by US military commanders that handed control of the town to tribal elders. The Taliban then seized Musa Qala in February.

One soldier from the NATO-led International Security Assistance Force (ISAF) was killed and another wounded in an explosion in southern Afghanistan yesterday, ISAF said, but it did not say where in the south the blast occurred.

A Taliban commander in Musa Qala said the insurgents had destroyed two NATO armoured vehicles and killed many foreign troops, without suffering any casualties.

Thousands of Taliban fighters were fighting to defend the town, the commander, Mullah Qasam told Reuters by satellite telephone. The Taliban frequently exaggerate foreign casualties.

US-led and Afghan forces toppled the Taliban for refusing to give up Al Qaeda leaders after the September 11, 2001 attacks on the United States.

But foreign forces had only a limited presence in Helmand, allowing the Taliban to regroup and take control of large parts of the mainly desert province until around 7,000 British troops moved in some 18 months ago.

Since then, there has been fierce fighting as British, Danish and Estonian ISAF troops, and Afghan forces wrested control of the major towns back from the Taliban.

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