South Korean police vowed Monday to press on with attempted murder charges against the man who injured U.S. ambassador Mark Lippert in a knife attack, despite the assailant's denial that he intended to kill.

Doctors said Lippert, 42, was recovering well from Thursday's assault by nationalist activist Kim Ki-Jong, which left the envoy requiring surgery to repair deep gashes to his face and hand.

President Barack Obama assured in a taped television interview Sunday that the United States was prepared to "walk away" from nuclear talks with Iran if a verifiable deal cannot be reached with Tehran.

Obama made the comments Saturday as US Secretary of State John Kerry was in Paris to smooth over differences with France, which has pressed for greater guarantees that an agreement will stop Iran from gaining a nuclear weapon, and a bruising speech to Congress earlier in the week by Israel's Prime Minister Benjamin Netanyahu.

A Mexican man killed by police in the United States in February was buried Saturday in his hometown, with his relatives demanding justice over his death.

Homeless Mexican immigrant Antonio Zambrano Montes was shot dead by police in the U.S. city of Pasco, Washington state, after throwing rocks at officers.

Mexican soldiers arrested 14 federal police for allegedly kidnapping a businessman in a city that borders the United States, a government official said Saturday.

The businessman, who works in construction, has since been released in the city of Matamoros, which shares a border with the US city of Brownsville in Texas, the Mexican government source told AFP. 

A disastrous raid on alleged Islamic militants has ignited the worst political crisis yet for Philippine President Benigno Aquino -- and questions about the extent of any U.S. role in the operation are deepening his discomfort.

Some Philippine lawmakers are asking whether the U.S. military played a leading role in the operation in January, which ended with 44 police commandos dead in a field in the country's Muslim-majority south.

Flying over the flaming barricades of the Maidan protests in Kiev, the camps of Auschwitz or hurtling down a ski slope -- drones have become a vital tool for cameramen, but they are increasingly running into legal and practical obstacles.

Many news networks such as the BBC, Russia Today and France's TF1 have bought their own drones in recent years and trained their cameramen to become remote-control pilots.

North Korea hit out Sunday at accusations that it may be behind a shocking knife attack on the U.S. envoy to the South, branding the claims a "vicious" smear campaign by Seoul.

Kim Ki-Jong slashed Mark Lippert with a paring knife Thursday in an assault that left the U.S. envoy needing 80 stitches to a deep gash on his face. 

President Barack Obama on Saturday cautiously threw his weight behind his former top diplomat Hillary Clinton, as she battles a fallout over her use of a private email account while heading the State Department.

Obama told CBS News he only learned this week, after a New York Times report, of Clinton's practice of conducting her official email business from a personal account on a private email server connected to her New York home.

A French fighter for the Islamic State painted life in the so-called caliphate as a civilized place, in a video posted by the extremist group Saturday.

The IS group said the narrative of the approximately 65-year-old former army trainer and businessman it dubbed as Abu Suhayb al-Faransi marked the first episode of a new series, according to the U.S.-based SITE monitoring network.

A police officer shot and killed a 19-year-old black youth who allegedly assaulted him in Madison, Wisconsin, the city's police chief said Saturday.

The incident Friday evening touched off protests in the Midwestern university city, and local media reported a heavy police presence in the area where the shooting occurred.