US Republican rivals Rick Santorum and Mitt Romney launch withering attacks on each other a day before primaries in Michigan and Arizona.

A fishing boat reaches an Italian cruise ship adrift with more than 1,000 people on board in the Indian Ocean, but tug boats are many hours away.

Greek debt classified as in "selective default" by the credit rating agency Standard and Poor's following the nation's bailout deal.

Police move in to remove protesters from the Occupy London site at St Paul's Cathedral.

Millions of Indian workers are expected to join a strike to demand better working conditions and measures to combat high inflation.

The White House welcomes a decision to build the southern leg of the Keystone XL pipeline, using a route which does not need presidential approval.

Japan retail sales rise more-than-expected in January driven up by a surge in car purchases as government subsidies boost demand.

A large extinct penguin has been reconstructed from fossil remains discovered in New Zealand.