Two bombs exploded outside a local doctor 's building , the Ministry of Health says . The first explosion was minor ; the second went off as a crowd gathered . The Boston Marathon bombing suspects terrorists from the North Caucasus . The source said the attack was planned for central Moscow . In Moscow , security forces say a terror plot is foiled .
Two bombs exploded outside a local doctor 's building , the Ministry of Health says . The first explosion was minor ; the second went off as a crowd gathered . The Boston Marathon bombing suspects terrorists from the North Caucasus . In Moscow , security forces say a terror plot is foiled .