Greek foreign ministry says emails hacked

Greece's foreign ministry on Monday said its internal email system had been penetrated by hackers and that an investigation was under way to determine the extent of the damage.

"A web posting on Monday announced a successful break-in by the 'Anonymous' group of activists into the ministry's email directory," the ministry said in a statement.

"An investigation is under way to determine the conditions and extent of the break-in, which mainly concerned material normally exchanged by email, including many press releases," it said. Social media tweets spoke of a "huge leak" involving some 3,700 documents, including restricted material, from the foreign ministry and the Organisation for Security and Cooperation in Europe (OSCE).