Wall Street suffers worst day in nearly two years after global sell-off

Fears of recession in US caused leading share indices to tumble, just weeks after they last scaled record highs

Wall Street suffered its worst day in almost two years after a global stock market sell-off sparked by fears of recession in the US.

America's leading share indices - the S&P 500, Dow Jones industrial average and Nasdaq Composite - tumbled in volatile trading as the day started in New York, before pulling back slightly.