It was not known who was responsible for the taps, which numbered about 100 and included Greek Prime Minister Costas Caramanlis and his wife, and the ministers of foreign affairs, defense, public order and justice. Most of Greece's top military and police officers were also targeted, as were foreign ministry officials and a U.S. embassy number. Also tapped were some journalists and human rights activists.

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Roussopoulos said the surveillance was carried out through spy software installed in the central system of Vodafone, the mobile telephony provider that served the targets.

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Vodafone - one of the country's four mobile telephony providers - discovered the tapping after receiving complaints from customers over problems operating their phones.

A bit too sophisticated for AQ, but sloppy enough to get caught.