Facebook buys popular messaging app WhatsApp for $19bn (£11.4bn), in a deal Mark Zuckerberg describes as "incredibly valuable".

Four asylum seekers challenging deportation to Italy in line with EU rules have been backed by the UK Supreme Court.

The US government warns airlines to beware of any attempts to smuggle explosives onboard in footwear, the second such security advisory this month.

Rio's samba schools in Brazil are rushing to finish thousands of costumes and huge floats for the parades of the carnival that starts on 1 March. Julia Carneiro reports.

Suicide bombers are believed to have taken part in a major attack on the northern Nigerian border town of Bama, the army has said. Will Ross reports.

North and South Korea are set for six days of reunions for families separated after the Korean War - the first to take place since 2010.

About 170 estranged relatives from North and South Korea are preparing to meet each other on Thursday for the first time in more than six decades.

California politicians announce a $687m (£412m) plan to provide immediate assistance to communities parched by a historic drought.