ATHENS — A powerful explosion damaged several cars in Athens and shattered glass windows outside a court building on Thursday but caused no injuries, police said.
“An anonymous call to a TV station warned that an explosive device on a parked motorcycle outside the court house would go off in about 40 minutes,” said a police official who did not want to be named.
Police evacuated the building before the blast, the official said.
Authorities believe a makeshift explosive device was placed on a motorbike parked outside the Athens courthouse whose facade was damaged by the blast.
Windows of buildings across the street were shattered and at least eight cars were damaged. There was no immediate claim of responsibility.
Greece has a decades old history of leftist violence. Some groups became more active after riots in December 2008, triggered by the police killing of a teenager. They usually target government buildings, police stations and banks, mostly at night, and make warning calls.