NEW : ` ` bomb can not be destroyed , '' Prime Minister says . Newspaper received call that bomb was outside Greece 's parliament building . A bomb exploded outside Greece 's parliament building in central Athens on Saturday evening , a blast near a national landmark that unnerved the country . Authorities sealed off area before explosive was detonated . Soldier 's tomb of the unknown soldier is in front entrance of building .
NEW : ` ` bomb can not be destroyed , '' Prime Minister says . Newspaper received call that bomb was outside Greece 's parliament building . Authorities sealed off area before explosive was detonated . Soldier 's tomb of the unknown soldier is in front entrance of building .