The discovery Monday came after letter bombs were sent last week to the German Finance Ministry and the Paris office of the International Monetary Fund, where a small explosion injured a member of staff.
The Greek militant group, Conspiracy Cells of Fire, claimed responsibility for the German attack, describing it as part of a campaign of violence by international anarchist groups.
No one was hurt Monday when the parcels were discovered. Police gave no further details, but said the parcels had been falsely labeled as being sent from academic institutions.
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