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LONDON (CBS NEWS)-- Documents leaked byformer NSA contactor Edward Snowdensuggest that spy agencies have a powerful ally in Angry Birds and a host of other apps installed on smartphones across the globe.

The documents, published Monday by The New York Times, the Guardian, and ProPublica, suggest that the mapping, gaming, and social networking apps which are a common feature of the world's estimated 1 billion smartphones can feed America's National Security Agency and Britain's GCHQ with huge amounts of personal data, including location information and details such as political affiliation or sexual orientation.

The size and scope of the program aren't publicly known, but the reports suggest that U.S. and British intelligence easily get routine access to data generated by apps such as the Angry Birds game franchise or the Google Maps navigation service.

© 2014 CBS Interactive Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.

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