Arseny Yatseniuk says the announcement to invade Ukraine made by Russia's Vladimir Putin was not a threat, but "the declaration of war to my country".
The US president has warned Russia's head of state against military action in Ukraine after its new leaders accused it of deploying troops in Crimea.
Barack Obama's ascent to power had meaning, but now his interventions are too rare and too piecemeal to constitute a narrative, writes Gary Younge.
Financial issues may resonate more when voters see a change in their living or working conditions, writes Lynley Donnelly.
This week, the DA has march drama, Zwelinzima Vavi threatens to sue Cosatu, France and the US get cozy, and an exhibition is plagued by disagreements.
The White House has filled Michelle Obama's seating area at the State of the Union address with people who represent issues important to her.
President Salva Kiir's government and the rebels backing Riek Machar have signed a ceasefire deal, a "critical first step" in peace negotiations.
Obamacare allies are pushing the White House to name a chief executive to run its health insurance marketplace and allay the concerns of insurers.
We take a look at some of the high and low points of Mandela's memorial, including Barack Obama's speech, booing crowds and Desmond Tutu's reprimand.
The US mission to SA says a fascination with a group "selfie" featuring Barack Obama should not be allowed to distract from honouring Nelson Mandela.
British Prime Minister David Cameron has laughed off criticism that he had acted inappropriately by taking a "selfie" at Mandela's memorial service.
It was a small gesture: a handshake between Barack Obama and Raul Castro. It's just what Nelson Mandela would have wanted, but does it amount to more?
US President Barack Obama has shaken hands with Cuba's Raul Castro, a rare gesture between the two ideologically opposed nations.
President Barack Obama has paid tribute to Nelson Mandela at his national memorial, thanking South Africans for sharing him with the world.
US President Barack Obama delivered a rousing tribute to Mandela in a speech that had crowds at the FNB Stadium cheering. Read the full speech here.
President Barack Obama has urged the people of the Central African Republic to remain calm amid mounting sectarian violence.
Despite comparisons between Nelson Mandela and Barack Obama, the US leader, who will speak at Madiba's memorial, says Mandela has inspired his career.
The memorial service for Nelson Mandela will include tributes by family members and various foreign leaders, including US President Barack Obama.
Minister Collins Chabane says 28 heads of state have been confirmed for Nelson Mandela's memorial service, with many still expected.