Singapore said Tuesday it will ban from its ports and naval bases an Indonesian navy ship named after two marines who bombed an office complex in the city-state in the 1960s.

Defense Minister Ng Eng Hen said the ship will be barred as part of a dispute over the Indonesian navy's decision to name the refurbished frigate after the two marines, Usman Haji Mohamed Ali and Harun Said.

French police on Tuesday arrested a 48-year-old man as part of their investigation into the 2012 murders of a British-Iraqi family and a cyclist in the Alps, the local prosecutor said.

Annecy prosecutor Eric Maillaud said the man, from the Haute-Savoie region, was placed in formal custody and was detained following the release in November of an identikit image of a mysterious motorcyclist seen near where the quadruple murder took place.

Beijing on Tuesday dismissed a U.N. report's warning that its officials could be complicit in alleged human rights violations by Pyongyang by forcibly repatriating North Koreans from China.

A 400-page United Nations report issued Monday detailed human rights violations including "extermination, murder, enslavement, torture, imprisonment, rape, forced abortions and other sexual violence".

A magnitude 6.5 earthquake struck Tuesday in the Caribbean near the island of Barbados, the U.S. Geological Survey said.

The quake hit at 0927 GMT about 170 kilometers (106 miles) north-northeast of the town of Bathsheba on Barbados, the USGS said.

A German court on Tuesday sentenced a former Rwandan town mayor to 14 years in jail for aiding genocide in a church massacre of hundreds of people 20 years ago.

The defendant, Onesphore Rwabukombe, 56, the former mayor of the town of Muvumba in northeastern Rwanda, showed no visible reaction when he was found guilty.

More than 20 people were injured, eight of them by gunshots, when Sudanese police allegedly opened fire on demonstrators in Sudan's Darfur region, peacekeepers said Tuesday, raising an earlier toll.

The African Union-U.N. Mission in Darfur (UNAMID) could not confirm that two people died in Monday's incident involving residents of the Hamadiya camp for displaced people just outside Zalingei, the capital of Central Darfur state.

Italy on Tuesday recalled its ambassador to India and summoned the Indian ambassador to express its concern over a delay in court proceedings against two Italian marines accused of killing two Indian fishermen.

Ambassador Basant Kumar Gupta was summoned "to express the bewilderment and profound disappointment of the Italian government", the foreign ministry said.

Rebel forces in South Sudan on Tuesday launched a major assault against the key oil-hub of Malakal, witnesses and officials said, as a ceasefire agreement with the government appeared to be in tatters.

Aid sources said small arms fire could be heard inside the town after a dawn artillery battle outside the government-held capital of Upper Nile state. The government admitted that the rebels controlled some parts of the town.

Pakistan's former military ruler Pervez Musharraf arrived in court on Tuesday for the first time to face charges in a treason case he has denounced as a score-settling exercise by Prime Minister Nawaz Sharif.

The 70-year-old arrived in a heavily protected cavalcade of at least half a dozen vehicles at the National Library in Islamabad where the court has been holding hearings, an AFP photographer said.

Nuclear talks between Iran and world powers moved to the next level Tuesday as negotiators began work on transforming an interim deal into an ambitious lasting accord.

Expectations were not high, however, for the scheduled three-day Vienna meeting between Iran and the United States, China, Russia, Britain, France and Germany, the first in a likely series of tricky encounters.