At least 91 people, including 20 children, are feared dead as a huge tornado rips through Oklahoma City suburbs, flattening whole districts.

Dozens of people are feared killed by a huge tornado which tore through Oklahoma City suburbs, officials in the US state say. BBC weather presenter Ben Rich explains how the tornado was formed.

Matilda the Broadway show wins five awards at New York's Drama Desk awards while Pippin, Cinderella and Who's Afraid of Virginia Woolf were also multiple winners.

Oklahoma tornado survivor talks about his experience in the storm

Ray Manzarek, keyboard player and founder member of the 1960s rock band The Doors, dies aged 74 in Germany after a long battle with cancer.

Ben Holcomb, who describes himself as a storm chaser, explained that he was following the tornado as it entered Moore City and told Today presenter James Naughtie what he saw.

President Barack Obama praises the leadership of Burma's Thein Sein after historic White House talks, but urges his visitor to halt violence against Muslims.

University looks into life-enhancing technologies

The US and Chinese presidents, Barack Obama and Xi Jinping, announce they will hold their first summit in California in June.

A gigantic tornado has ripped through a suburb of Oklahoma City, on the second day in a row the Midwestern state of Oklahoma has been slammed by twisters.

Senior White House aides were informed last month of an inquiry into the US tax agency's targeting of conservative political groups, an official says.

Fifteen-year-old Abby Harrison is already training to become an astronaut and hopes to reach Mars by 2030.

US President Barack Obama will visit Senegal, South Africa and Tanzania in his first extended tour of sub-Saharan Africa, the White House says.

Yahoo says its $1.1bn (£723m) purchase of blogging platform Tumblr will boost its revenue as soon as 2014.

Yahoo agrees a deal to buy New York-based blogging platform Tumblr for $1.1bn (£723m) in a deal that will value its founder's stake at $275m.

China cannot be a "free rider" when it comes to global trade, the EU's trade commissioner, Karel De Gucht, warns.

Storm-chasers have captured footage showing tornadoes touching down in both Texas and Kansas.

At least two people die and 21 others are injured in a series of tornadoes that tore through the US state of Oklahoma.

The Catholic archbishop of Boston boycotts a visit to the city by the Irish prime minister over his government's plans to allow abortions in certain circumstances.

Nigel Wright, chief of staff of Canadian Prime Minister Stephen Harper, resigns over his role in a growing expenses scandal.