Volkswagen CEO: 'We have totally screwed up'

The President and CEO of Volkswagen's US group has admitted that the company "totally screwed up" in using software to rig emissions tests.

Michael Horn told an audience in New York that Volkswagen had been "dishonest" and that their actions went against their own "values".

Last Friday, US regulators said VW diesel cars had much higher emissions than tests had suggested. Some other governments have announced they will also investigate.