Two trains collide on the Warsaw-Cracow mainline in southern Poland, with six dead and about 50 injured, local officials say.

US radio host Rush Limbaugh apologises for calling a law student who testified to a congressional committee in support of contraception a "slut".

Reports from Guinea say up to 50 people have died after a lorry taking people to market crashed in the east of the country.

A child and two soldiers are killed in a bomb attack in eastern Colombia which officials blame on the largest left-wing rebel group, the Farc.

The US government says it will continue its case against BP over the Deepwater Horizon oil spill, despite a deal reached by BP with other claimants.

US presidential candidate Mitt Romney wins caucuses in the state of Washington as Republican hopefuls prepare for contests on Super Tuesday.

The Red Cross attempts for a third consecutive day to deliver aid to the devastated Baba Amr district of the Syrian city of Homs.

China announces an 11% hike in its official military budget in a move likely to add to regional unease about its growing aspirations and clout.