Barack Obama holds his year-end news conference
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Obama hints at rethink on NSA spying

21 December 2013 Last updated at 05:25 GMT

US President Barack Obama has suggested there may be a review of surveillance by the National Security Agency in the wake of a series of spying revelations.

Mr Obama said ex-NSA contractor Edward Snowden had caused "unnecessary damage" by leaking documents.

On Friday, more details of people and institutions targeted by UK and US surveillance - from documents leaked by Mr Snowden - were published by The Guardian, The New York Times and Der Spiegel.

Katy Watson reports.