Twitter app
Media playback is unsupported on your device
Video

NSA 'abuses phone database for political purposes'

The US National Security Agency (NSA) has collected and stored almost 200 million text messages a day from around the world, UK media report.

The NSA extracts and stores data from the SMS messages, and UK spies have had access to some of the information, the Guardian and Channel 4 News say.

Beth McLeod reports.

Go to next video: US phone surveillance 'lawful'