South Korea is continuing to search for survivors after an 'unexplained' explosion sank one of their warships.

US President Barack Obama has arrived in Afghanistan on an unannounced visit.

Protesters gathered outside the main Catholic church in the UK to call for the Pope's resignation over clerical sex abuse.

Landmarks such as the Sydney's Opera House, and Big Ben temporarily went dark as nations dimmed the lights for Earth Hour 2010.

A combination picture shows Berlin’s Brandenburg Gate before (top) and during Earth Hour March 27, 2010. REUTERS/Fabrizio Bensch

Reuters’ photographers around the world were out in full force on Saturday to capture their city’s landmarks as the lights went out for Earth Hour.

From Beijing to Berlin, before and after photographs were taken and combined into this short video to illustrate the symbolic one-hour switch-off.

As the Vatican prepares for Easter the Catholic church faces accusations it did not do enough to stop the sexual abuse of children.

Sydney's iconic Harbour Bridge and Opera House temporarily went dark on Saturday for Earth Hour 2010 to call for action on climate change.

Iraqi Prime Minister Nouri Maliki says he will contest the results of parliamentary elections that saw former PM Iyad Allawi win.

Israelis and Palestinians have fought their worst clash in a year as Israel said it would not stop building in East Jerusalem.

Several South Korean sailors have been killed after a navy ship was hit in a suspected torpedo attack by North Korea.

US President Barack Obama and Russian President Dmitry Medvedev have sealed an agreement on a landmark nuclear arms reduction treaty.

Police in the US are searching for over $100,000 after a security van dropped a bag of cash at a junction in Ohio.