The European Union has reported a serious cyber attack on its Commission and External Action Service on the eve of a summit in Brussels.
The BBC reports that crucial decisions on the future structure of the EU, economic strategy and the war in Libya are to be discussed at the two-day talks.
The EU has not given any details but other sources compared the attack to a recent assault on France's finance ministry.
The European Commission says it is assessing the scale of the current threat.
France's finance ministry came under a cyber attack in December that targeted files on the G20 summit held in Paris last month.
Confirming the attack, Budget Minister Francois Baroin said an investigation had been launched.
Paris Match magazine said a sustained cyber attack had sought documents related to the G20 and international economic affairs.
More than 150 of the French ministry's 170,000 computers were affected.
