BBC News with Julie Candler.

The American Secretary of State Hillary Clinton says the United States, Russia and China have agreed a draft UN resolution for further sanctions against Iran. She said the draft resolution could be quick-circulated among members of the UN Security Council later today.

"

I think this announcement is as convincing an answer to the efforts

undertake

n in Tehran over the last few days as any we could provide."

The BBC UN correspondent says the announcement is significant a day after Turkey, Brazil and Iran reached a nuclear fuel swap agreement, which they said removed the need for further sanctions against Tehran.

A series of primary elections is taking place in the United States in what's being seen as a crucial electoral test for President Obama. Voters in four states, Kentucky, Arkansas, Pennsylvania and Oregon, are selecting candidates to take part in key mid-term contests in November. Analysts say that's a

volatile

political mood in the United States resulting in many incumbent politicians facing strong opposition.

In a stormy session, the Nigerian parliament has confirmed the candidate chosen by President Goodluck Jonathan to become his deputy. Legislators screamed at one another amid chaotic scenes as Namadi Sambo, the governor of the northern state of Kaduna, was confirmed as vice president. Caroline Duffield reports.