Ukraine's opposition threatens to lead pro-EU protesters "on the attack" in the capital, Kiev, if the government fails to call snap elections.

A 29.6-carat blue diamond is discovered in Cullinan mine in South Africa, which is famed for its production of the rare stones.

American car giant General Motors are offering racing enthusiasts a 'performance data recorder' on its Corvette range.

Two Palestinian militants are killed by an Israeli air strike in the Gaza Strip, Palestinian and Israeli officials say.

Argentina introduces new curbs on purchases from international websites such as Amazon, in a bid to stop foreign currency reserves falling further.

An Iranian-American engineer is indicted for attempting to ship stolen documentation on a high-tech military plane to Iran, authorities say.

Chinese anti-corruption activist Xu Zhiyong is on trial, as a report says members of China's elite have set up offshore companies in tax havens.

The Geneva II peace conference, aimed at finding a political solution to the three-year conflict in Syria, is due to start in Switzerland.