The US, Canada and UK announce fresh sanctions against Iran amid growing concern over Tehran's nuclear programme.

Cuban farmers will be allowed to sell their products directly to tourist businesses under new rules to be introduced next month.

Computer firm Hewlett-Packard unveils a 91% fall in fourth-quarter profits as it swallows a $3.3bn (£2.1bn) charge to close down its WebOS business.

The campus police chief at the University of California, Davis is put on administrative leave over Friday's pepper-spraying of peaceful protesters.

The three parties in Tunisia's coalition agree on senior government officials, including moderate Islamist Hamadi Jebali as prime minister.

The shortfall in customer cash held by collapsed brokerage firm MF Global may have doubled to $1.2bn (£760m), according to liquidators.

The Brazilian government says it will fine US oil company Chevron $28m (£17.9m) for causing an oil spill off the coast of Rio de Janeiro.

A "remarkable" night-flowering orchid, the first of its kind known to science, has been described by a team of botanists.