Moody's downgrades six eurozone countries

Credit rating agency Moody's has downgraded the credit ratings of six eurozone countries, including Italy, Portugal and Spain.

It left Ireland's rating unchanged.

It says it has taken this step because of worries about weaker growth prospects and fallout from the Eurozone crisis.

Moody's also lowered the outlook for the UK, France and Austria, threatening to cut their triple-A rating.