Four bodies have so far been found in the Pacific Ocean from a Chilean air force plane carrying 21 people that disappeared on its way to a remote archipelago, the military said Saturday.

"So far we have found two female bodies and two male bodies; in none of the cases have they been identified," said Air Force chief Maximiliano Larraechea.

The U.S. State Department on Friday issued a worldwide travel alert ahead of the 10th anniversary of the 9/11 attacks, calling on Americans living and traveling abroad to remain vigilant.

The department said it had not identified any "specific threats" about possible attacks but that al-Qaida and its affiliates had "demonstrated the intent and capability to carry out attacks" against the U.S. and U.S. interests.

At least 21 people have been killed and 31 others wounded in two days of heavy fighting on the border of Somalia proper and the breakaway state of Puntland, officials and witnesses said Friday.

Clashes broke out Thursday in the northern part of Galkayo town after Puntland soldiers raided neighborhoods searching for gunmen linked to Al Qaeda-inspired Shebab militants.

A 6.4 magnitude earthquake rocked northern Argentina Friday, but the epicenter was almost 600 kilometers (370 miles) underground and there were no immediate reports of casualties or damage.

Experts from the U.S. Geological Survey said the quake struck at 10:47 am local time (1347 GMT) about 30 kilometers (20 miles) west of Anatuya, a small town in the northern Argentine province of Santiago del Estero.

A strong 6.8-magnitude earthquake struck Alaska's Aleutian Islands early Friday, triggering a tsunami warning for the remote region that was later lifted, the US Geological Survey reported.

The underwater quake occurred at 1:55 am (1055 GMT) some 80 miles (130 kilometers) from the town of Dutch Harbor, one of several spots in the Pacific island chain that host commercial fishing operations.

Anti-secrecy website WikiLeaks said on Friday it had published its full cache of more than 250,000 U.S. diplomatic cables, which could be accessed through an Internet link without a password.

"RELEASE CABLEGATE2: 251,287 U.S. embassy cables in searchable format," said a message on WikiLeaks' Twitter account.

Taliban militants have kidnapped more than 30 Pakistani boys who had mistakenly crossed the unmarked border in the country's lawless northwest into Afghanistan

They said the incident took place on Thursday after the group of boys, aged between 12 and 18-years-old, visited the area of Gharkhi in Pakistan's Bajaur tribal region for celebrations marking the Muslim Eid holiday.

Turkey has agreed to host an early warning radar as part of NATO's missile defense system aimed at countering ballistic missile threats from neighboring Iran, the Turkish Foreign Ministry said Friday.

A ministry statement emailed to journalists said discussions on NATO-member Turkey's contribution to the alliance missile defense shield had reached "their final stages."

Australian Prime Minister Julia Gillard dismissed mounting speculation Friday about her future, vowing to stay in the job despite a crushing court blow to the government's asylum-seeker policy.

The nation's highest court on Wednesday scuttled Canberra's proposal to send 800 boat people to Malaysia, in a huge embarrassment for Gillard and her fragile Labor government, sparking fevered talk that her days are numbered.

A passenger miraculously survived when a light plane nosedived into the sea off Sydney on Friday after onlookers plunged into the choppy ocean to rescue him.

The pilot was killed in the crash just off a northern Sydney beach despite two policemen stripping off their uniforms and swimming to the wreckage to try and find him.