A bomb attack at a Greek ministry in Athens has left one person dead and one injured, reports said. Greek police say an explosion has rocked the Greek public order minister's office.

Police say the blast occurred Thursday afternoon at 20.30 on the seventh floor of the heavily guarded ministry building in Athens.

Police said the bomb had been hidden in a package disguised as a gift

It was not immediately clear whether there were any injuries, or whether Minister Michalis Chryssohoidis was in the building at the time of the explosion.However, the minister was inside the building at the time but he was not harmed.

Greek Public Order Minister shortly announced that a bomb attack inside his ministry has killed one of his close associates and added that the ''cowardly murderers will be brought to justice