NATO chief praises work of Afghan security forces , says overall violence has fallen . The Taliban kill a provincial council candidate and six supporters , police say . In Belgium , a suicide bomber kills nine Afghans policemen at Interior Ministry gate , official says . The violence is the latest to rock Afghanistan in the run-up to the April 5 vote . The Taliban have vowed to disrupt the last two years elections and punish those involved in them .
NATO chief praises work of Afghan security forces , says overall violence has fallen . The Taliban kill a provincial council candidate and six supporters , police say . In Belgium , a suicide bomber kills nine Afghans policemen at Interior Ministry gate , official says . The Taliban have vowed to disrupt the last two years elections and punish those involved in them .