<sod >A car bomb attack outside a sports stadium in Helmand province, Afghanistan, has killed at least 12 people andÃÂÃÂ injured 40 others.< eod>< sod > A car bomb attack outside a sports stadium in Helmand province, Afghanistan, has killed at least 13ÃÂÃÂ people andÃÂÃÂ injured 40ÃÂÃÂ others.< eod>