US plane alert: 'Explosives found' in Yemen cargo

Initial examinations of two suspicious packages bound for the US show they appeared to have contained explosive materials, US President Barack Obama has confirmed.

He said the packages, found in the UK and Dubai on two overnight planes in transit from Yemen, were destined for Jewish places of worship in Chicago. Security alerts are under way in the US, UK and Middle East after the packages were found.

Mr Obama said the discovery represented a credible terrorist threat against the US.

The BBC's North America Editor Mark Mardell reports.