Technology firm Yahoo announces the appointment of Google executive Marissa Mayer as its third CEO in the space of a year.

The most senior Syrian politician to defect to the opposition tells the BBC that the regime will "not hesitate" to use chemical weapons if it is cornered.

North Korea has appointed Hyon Yong-Chol as its new military chief, the country's official news agency says.

US health regulators for the first time approve a drug to prevent HIV infection, despite warnings it could engender a false sense of security.

A US Senate probe discloses how lax controls at Europe's largest bank left it vulnerable to being used to launder dirty money from around the world.

The G4S chief executive will go before a committee of MPs later to explain why his firm said it would not be able to provide the Olympic security staff it had promised.

The Scottish cabinet is expected to discuss plans to legislate for same-sex marriage when it meets later.

The UK Border Agency has cut 1,000 more staff than intended and is having to hire extra people and increase overtime to meet its workload, a report says.