Volkswagen Chief Executive Martin Winterkorn resigns

Volkswagen Chief Executive Martin Winterkorn has resigned following the revelation that the firm manipulated US diesel car emissions tests.

Mr Winterkorn said he was "shocked" by recent events and that the firm needed a "fresh start".

He added that he was "not aware of any wrongdoing on my part" but was acting in the interest of the company.

The BBC's Richard Westcott reports.