An explosive device has detonated outside the Korydallou maximum security prison, injuring one person.
It exploded after an anonymous tip-off to Greek media outlets Eleftherotypia daily newspaper and Alter television station.
They reported the bomb had been placed outside a disused section of the prison, hidden in a travel bag.
It is believed a young woman was injured by shattered glass.
Political bombings are common in Greece.
They are usually designed to avoid causing injury.
Far-left or anarchist extremeist groups often claim responsibility.
