Bomb disposal experts search near the remains of a car after a car bomb exploded outside a Bank of Greece building in central Athens, causing some damage but no injuries. Photo: Petros Giannakour/AP

Police bomb disposal experts search next the remains of a car after a car bomb explosion in central Athens on Thursday, April 10, 2014. A bomb exploded outside a Bank of Greece building in central Athens before dawn Thursday, causing some damage but no injuries.The blast came hours before Greece was to return to the international bond markets for the first time in four years, and a day before German Chancellor Angela Merkel was to visit Athens.(AP Photo/ Petros Giannakouris)