France's foreign intelligence service intercepts computer and telephone data on a vast scale, like the controversial US Prism programme, according to the French daily Le Monde.

The data is stored on a supercomputer at the headquarters of the DGSE intelligence service, the paper says.

The operation is "outside the law, and beyond any proper supervision", Le Monde says.

Other French intelligence agencies allegedly access the data secretly.

It is not clear however whether the DGSE surveillance goes as far as Prism. So far French officials have not commented on Le Monde's allegations.Report: France Runs Vast Data and Telephone Call Surveillance [bbc.co.uk]