US Health Secretary Kathleen Sebelius resigns following problems with the launch of President Barack Obama's signature healthcare law.

Israel is to impose sanctions against the Palestinian Authority in retaliation for signing a number of international treaties.

Environmentalists in Ecuador say they have enough signatures for a referendum on controversial oil drilling plans for an Amazon national park.

The US accuses Russia of using gas supplies to control Ukraine, as Nato defends the accuracy of satellite images of Russian troops on the border.

Australian PM Tony Abbott says teams searching for missing flight MH370 jet are confident that signals detected are coming from its black box.

Oscar Pistorius is cross-examined for a third day at his murder trial, a day after the prosecution tried to portray him as a selfish liar.

Ukraine's acting Prime Minister Arseniy Yatsenyuk is travelling to the east of the country to try to end a stand-off with pro-Russia protesters.

Venezuela's president meets opposition leaders in crisis talks aimed at quelling weeks of protests, in which dozens have died.