European Union officials have launched an investigation after bugging devices were found at offices used by several delegations - including those of France, Germany and the UK.
Extra security measures have been adopted ahead of a meeting of EU leaders in Brussels on Thursday and Friday.
Spanish, Italian and Austrian offices had also been bugged, officials said...
EU spokesman Dominique-Georges Marro said it was "impossible at this stage" to determine who had planted the devices. (more)
