The European Union's executive body has decided to ax its investigation into the allegations that the U.S. spied on EU citizens, angering lawmakers in the bloc's Parliament who called for tougher actions against America's surveillance regime.

The European Commission's decision is a major blow for the European Parliament who have staged a series of inquiries into the snooping claims and called for the suspension of a controversial financial data-sharing agreement between the EU and the U.S. aimed at tracking terrorists' funds.