Athens: A package exploded at a private delivery company in Athens today, injuring a woman, and Greek police were investigating two other locations in the city.
The woman was hospitalised but did not suffer life-threatening injuries, said police, who described the blast as small.
Police cordoned off another area in central Athens to examine a suspicious package and detained two men at the scene, while authorities were also making inquiries at a post office in the city but gave no other details.
Greek far-left and radical militant groups have used mail bombs in attacks in the past.
In June 2009, a senior official at the country`s public order minister was killed in a letter bomb blast.