Eight Turkish soldiers captured last month by Kurdish guerrillas were released in northern Iraq yesterday, a move which could ease public pressure on Turkey's government to launch a major cross-border incursion.

The release of the soldiers came a day after the Iraqi government vowed to hunt down Kurdistan Workers Party (PKK) militants responsible for raids into Turkey.

Washington has urged Nato-ally Turkey to refrain from sending in thousands of troops, saying it could destabilise northern Iraq and cause a bigger regional crisis.

President George W. Bush is due to discuss the situation with Turkey's Prime Minister Tayyip Erdogan in Washington today.

"The eight soldiers in question returned (to) the Turkish Armed Forces on November 4," the chief of staff's website said. Turkish TV said the soldiers flew home in a military plane and talked to their families by phone after landing.

"The release of the Turkish soldiers is a significant move in reducing the tension," said Britain's defence secretary, who just returned from a visit to Iraq, including Iraqi Kurdistan.

"This is, though, only a first step. We need to see concrete measures taken by the Iraqi Kurdish officials to curtail the activities of the PKK," Des Browne said.

Turkey wants leaders of the PKK arrested and the closure of camps in Iraq used as bases for cross-border attacks in their 23-year campaign for a homeland in southeastern Turkey.

Fouad Hussain, head of the office of Iraqi Kurdish leader Masoud Barzani, said Iraqi Kurdish leaders helped in releasing the soldiers.

"This issue proved one thing, that the Iraqi Kurds and Iraqi leadership, they are part of the solution. And they want to have a good relationship and they work to have a good relationship with Turkish people," Mr Hussain told reporters in Arbil.

Turkey stepped up pressure on Baghdad to act against the PKK after guerrillas killed at least 12 soldiers and captured eight in an attack on a Turkish army post near the Iraqi border last month.

In response to what it sees as foot-dragging by Iraq and a lack of pressure by the US, Turkey has deployed 100,000 troops on the border and threatened to go after the PKK if nothing is done to rein them in.

The US said it applauded the efforts of the Iraqi government to secure the Turkish soldiers' freedom.

"We urge continued, deepened and immediate cooperation between Iraq and Turkey in combating the PKK, which is a common enemy of Turkey, Iraq and the United States," said US State Department spokesman Sean McCormack, who was in Jerusalem along with Secretary of State Condoleezza Rice

Abdul Rahman Chaderchi, a senior PKK member, said the eight soldiers were released without ransom or conditions as a message from PKK.

"We want Turkey to release our president Abdullah Ocalan," he said. Mr Ocalan is serving a life sentence in prison on an island in Turkey's Sea of Marmara.

Another PKK official told Kurdish Firat news agency that the release was to help boost dialogue with Turkey.

The PKK is considered a terrorist organisation by the US, Turkey and the EU. Nearly 40,000 people have been killed since the PKK took up its armed struggle for Kurdish self-rule in southeast Turkey in 1984.

An escalation of separatist violence in recent weeks and the capture of the soldiers sparked public outcry in Turkey and calls for an offensive against the militants in northern Iraq.

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