Brussels, 26/03/2004 (Agence Europe) - Heads of State and governments of the EU have expressed their intense frustration at the worsening situation in the Middle East following the assassination of the Hamas leader Sheik Ahmed Yassine during their long discussions on the issue on Thursday evening in Brussels. In the conclusions adopted at the European Council on Friday, they reiterated the position of the EU, calling on parties to "abstain from any new escalation and take measures necessary...