A global arms trade treaty regulating the multibillion-dollar business comes into force - a move hailed as "a new chapter" by UN chief Ban Ki-moon.

Taxi booking firm Uber has apologised for raising fare prices during a deadly cafe siege in Sydney last week, saying its decision was wrong.

Prosecutors in South Korea seek an arrest warrant for a Korean Air executive at the centre of a storm over how nuts were served to her on a plane.

The warring parties in eastern Ukraine are set to resume talks on ending the conflict, a day after MPs in Kiev vote to work towards Nato membership.

South Korea asks for Chinese help after a cyber-attack on its nuclear power network is traced to the north-eastern Chinese city of Shenyang.

All vehicle movement in Nigeria's north-eastern Borno state is banned from Christmas Eve until Sunday to prevent militant attacks, the army says.

Dozens of people pocket millions of Hong Kong dollars after a van crashes on a major road, spreading banknotes across the tarmac.

Russian investigators say they have evidence Malaysia Airlines MH17 may have been downed by a Ukrainian pilot, but Kiev rejects it as fake.