A bomb exploded outside a branch of Citibank in Athens early this morning.
The bomb exploded at the rear of the bank's building in the suburb of Psychiko, breaking its windows.
Police said there was no warning and no group had claimed responsibility for the attack.
A police source said two cars were also damaged in the blast which happened at 1am Irish time.
Last month a large car bomb was defused outside another Citibank office in Athens.
