Greece

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.

Greek police said Monday they had arrested an 18-year-old suspected of hacking into the justice ministry’s website earlier this month, an attack claimed on behalf of online hackers group Anonymous.

Two other boys aged 16 and 17 were also being sought over the case, police said.