NEW : U.S. Vice President Biden to attend inauguration for new Ukrainian president . Journalist Victoria Butenko contributed to this report . NEW : Seven people die in explosion in government building in same city . Five militants have been killed , the State Border Guard Service says . Comment:
NEW : U.S. Vice President Biden to attend inauguration for new Ukrainian president . NEW : Seven people die in explosion in government building in same city . Five militants have been killed , the State Border Guard Service says . Comment: