A small bomb has exploded in central Athens, causing minor damage but no injuries, Greek officials say.
The night-time blast – outside the Greek Business Federation offices and close to the parliament building – shattered windows in nearby buildings.
It is the first such incident since the radical left led by Syriza under Alexis Tsipras took power in January.
The number of makeshift bomb and arson attacks has risen during Greece’s continuing economic crisis.
Police sealed off the area near Syntagma Square, launching an investigation.
No group has so far said it caused the blast.