Greek authorities say a bomb has exploded outside a bank in central Athens, causing minor damage to the building but no injury.

The explosion late Wednesday followed an anonymous warning call to a private Greek television station, and police were able to evacuate the area before the bomb detonated.

A police statement said the device was left in a bag outside the entrance to the bank, which is situated close to two busy avenues.

No group claimed responsibility for the attack. Similar bombings in the past have been claimed by extreme left or anarchist groups.