François Hollande said there could be no negotiations or transactions in any areas until France obtained guarantees that spying stops now.
Leaders from across political spectrum say whistleblower should be given refuge in France as president calls for US spying to stop 'immediately'..
French foreign minister Laurent Fabius said that if claims made in Der Spiegel magazine are confirmed, it would be 'totally unacceptable'.
Furniture giant Ikea reportedly paid for secret police files to spy on "complaining" customers and "suspicious" staff at stores in France.
A top French prosecutor close to President Nicolas Sarkozy has been placed under investigation for illegally spying on French journalists.