Early information indicated that the device had been placed on a motorbike.
A bomb exploded outside a court in Athens on Thursday, causing damage to the building after a warning phone call had enabled police to evacuate the area, a police source said.There were no immediate reports of injuries as television footage showed smoke billowing in front of the Athens court complex near the city centre. Several of the building's windows were smashed.
Early information indicated that the device had been placed on a motorbike, the police source said.
"It was a rather strong explosion," a local kiosk owner told Alter television, which received the warning phone call some 40 minutes before the blast and notified police.