The blast occurred late Wednesday following warning telephone calls to a newspaper and news website, with the device exploding a few minutes earlier than the time given by the anonymous caller.
The explosion damaged the store as well as nearby parked cars and apartment block windows. It happened near a police station in a neighborhood where militant anarchist groups are active.
Bomb and arson attacks are relatively common in Greece, mostly targeting banks and politicians' offices, and rarely causing injury.
A Greek militant anarchist group claimed responsibility for the blast. The Conspiracy Nuclei of Fire nihilist group said Thursday the attack targeted a prosecutor living in the block of flats above the ground-floor bookshop.
In a posting on a left-wing website, the group accused prosecutor Georgia Tsatani of corruption and excessive severity in her handling of a case involving the wife of a convicted group member.
The group has claimed responsibility for a series of blasts, including a failed parcel bomb campaign that targeted European politicians in 2010.
First Published On : Oct 13, 2016 15:56 IST