Investigators continue to question key witnesses over the death of top Argentine prosecutor Alberto Nisman, whose body was found at his apartment a week ago.

Greeks vote in general elections, with the anti-austerity Syriza and the centre-right New Democracy parties seen as front-runners in a tight race.

US President Barack Obama calls Japan's PM to offer condolences after the apparent murder of a Japanese hostage by Islamic State.

Michael Keaton's film Birdman emerges as a strong contender for the Academy Awards after being given the Producers Guild of America's top prize.

The Indonesian official leading efforts to recover AirAsia flight QZ8501 says the fuselage appears to be too fragile to be lifted, after failed bids to raise it.

A lock of President Abraham Lincoln's hair fetches $25,000 (£16,600) at an auction of memorabilia that sells for more than $800,000 in total.

The World Health Organization sets out plans for reform, admitting it was too slow to respond to the "horrific" Ebola outbreak in West Africa.

At least 10 people are killed in Cairo during street protests marking the fourth anniversary of the start Egypt's 2011 uprising.