Cambodia's opposition warned strongman premier Hun Sen of a "final campaign" against him unless fresh elections are held, as it rallied Friday in the country's northwest despite recent bloody crackdowns on protesters.

Opposition leader Sam Rainsy and his deputy Kem Sokha met hundreds of supporters in Siem Reap province after authorities banned anti-government rallies in the capital and renewed calls for Hun Sen to resign over alleged vote fraud in July 2013 polls.

The U.S.-led international coalition in Afghanistan says two of its service members and one civilian employee have died in an aircraft accident.

A NATO statement says the "aircraft mishap" happened on Friday in eastern Afghanistan.

A former Taiwanese air force officer was sentenced to life in prison for spying for China, a court said Friday, adding to a string of spying scandals in recent years.

Lieutenant Colonel Yuan Hsiao-feng was convicted on 12 accounts of leaking confidential military information to China between 2003 and 2007, the supreme court said.

Fugitive intelligence contractor Edward Snowden's theft of 1.7 million secret documents could potentially put U.S. military forces in "lethal" danger worldwide, American lawmakers warned Thursday, citing a confidential Pentagon report.

The Defense Department prepared and sent on Monday to prominent members of Congress a classified paper analyzing the potential impact of revelations by the former National Security Agency (NSA) contractor.

The top U.S. negotiator in talks to secure a long-term security deal with Afghanistan has warned that President Hamid Karzai is unlikely to sign the agreement on time, The Washington Post reported Thursday.

The assessment was made in recent days by U.S. Ambassador James Cunningham in a classified cable, after President Barack Obama's administration repeatedly extended the deadline for the agreement, originally due to be signed early last fall.

Police in Pakistan's troubled northwest have recommended a teenager who was killed stopping a suicide bomber from attacking a school for a top civilian honor.

Aitzaz Hassan, 15, a student in Hangu district, in Khyber Pakhtunkhwa province, on Monday tackled the bomber who had come to attack his school at a time when hundreds of students were inside.

Officials now believe Taliban insurgents brought down a U.S. military helicopter in December in southern Afghanistan, in an incident that was first portrayed as a crash.

Six U.S. troops were killed when the Blackhawk chopper went down in Zabul province on December 17, but the precise circumstances around the crash have been the subject of confusion.

The United States is watching with concern a deepening political crisis unfolding in its key ally Turkey, and has voiced its disquiet to Turkish leaders, a U.S. official said Thursday.

"In our conversations with all stakeholders in Turkey, we continue to make clear that the United States supports the desire of the Turkish people for a legal system that meets the highest standards of fairness, timeliness and transparency," State Department spokeswoman Jen Psaki told reporters.

India asked the United States to withdraw an embassy official on Friday in a fresh retaliatory measure just as a bitter dispute over the arrest of a diplomat in New York appeared to have cooled.

Relations have been in crisis since December 12 when Indian consulate worker Devyani Khobragade was arrested for alleged visa fraud and making false statements relating to the employment of a domestic servant.

The United Nations said Thursday the South Sudan conflict death toll is "very substantially" higher than the 1,000 given so far, as it stepped up efforts to shelter civilians.

The U.N. mission in South Sudan has cut all military links with the government army and is ready to act against any attack by the army one of its bases, U.N. officials said.