Greece has suspended international air mail for 48 hours after several parcel bombs were sent yesterday, including one to German Chancellor Angela Merkel. An extreme left-wing group is suspected of being responsible. Parcel bombs and suspicious packages were sent to embassies in the capital, Athens, and international organisations. Greek police said the air mail service was being suspended to allow checks to be carried out. A private courier plane, found to be carrying a suspect package from Athens, was re-routed to Bologna airport in Italy yesterday. The package was addressed to Italian Prime Minister Silvio Berlusconi, Greek police said. Meanwhile, the German government has said that a parcel bomb delivered at Chancellor Angela Merkel's office came from Greece but ruled out any al-Qaeda link to the foiled plot.German Interior Minister Thomas de Maiziere said, the packet was sent from Athens by air mail two days ago disguised as books and the explosive device hidden inside was very similar to the parcel bomb which exploded yesterday at the Swiss embassy in Athens. He told reporters a left extremist group responsible for the current wave of parcel bomb attacks in Greece may be behind the package sent to Berlin.