By Richard Galpin BBC, Athens

Alleged November 17 members are currently on trial

A group calling itself Revolutionary Struggle has claimed responsibility for two bomb blasts near the main courts in the Greek capital, Athens.

One policeman was injured and a building damaged in the attack.

The bombs exploded at around three o'clock on Friday morning local time, inside the complex of courts and prosecutors officers in the capital.

A policeman who was injured in the leg has now been released from hospital, and although there was some damage to one of the buildings, the courts operated normally throughout the day.

The group which has claimed responsibility for the attack has not been heard of before, but a government spokesman has indicated he thinks it may be linked to a radical left-wing organisation many of whose members were arrested last year.

Testimony

The alleged members of the group, called November 17, are currently on trial.

They are facing charges including murder, causing explosions and membership of a terrorist organisation.

The group is accused of killing more than 20 politicians, businessmen, judges and foreign diplomats in a wave of attacks which began in the 1970s.

On Thursday the alleged mastermind of the group gave testimony in the trial, which is taking place inside a maximum security prison.

The government spokesman said Friday's bomb attack would not influence the outcome of the trial, which began in March.